diff --git a/chat-commands.js b/chat-commands.js
index 9953a91630..836cd44ff3 100644
--- a/chat-commands.js
+++ b/chat-commands.js
@@ -1398,8 +1398,8 @@ exports.commands = {
 		let curRoom = targetRoom;
 		while (curRoom.parent) {
 			const modjoinSetting = curRoom.modjoin === true ? curRoom.modchat : curRoom.modjoin;
-			const roomType = (modjoinSetting ? `modjoin ${modjoinSetting} ` : ``);
-			const inheritedUserType = (modjoinSetting ? ` of rank ${modjoinSetting} and above` : ``);
+			const roomType = (modjoinSetting ? `modjoin ${modjoinSetting} ` : '');
+			const inheritedUserType = (modjoinSetting ? ` of rank ${modjoinSetting} and above` : '');
 			if (curRoom.parent) {
 				buffer.push(`${curRoom.title} is a ${roomType}subroom of ${curRoom.parent.title}, so ${curRoom.parent.title} users${inheritedUserType} also have authority in this room.`);
 			}
@@ -1503,7 +1503,7 @@ exports.commands = {
 			);
 		}
 
-		const reason = (target ? ` (${target})` : ``);
+		const reason = (target ? ` (${target})` : '');
 		this.addModAction(`${name} was banned from ${room.title} by ${user.name}.${reason}`);
 
 		let affected = Punishments.roomBan(room, targetUser, null, null, target);
@@ -1830,7 +1830,7 @@ exports.commands = {
 		this.add(`|unlink|hide|${userid}`);
 		if (userid !== toId(this.inputUsername)) this.add(`|unlink|hide|${toId(this.inputUsername)}`);
 
-		const globalReason = (target ? `: ${userReason} ${proof}` : ``);
+		const globalReason = (target ? `: ${userReason} ${proof}` : '');
 		this.globalModlog((week ? "WEEKLOCK" : "LOCK"), targetUser || userid, ` by ${user.userid}${globalReason}`);
 
 		// Automatically upload replays as evidence/reference to the punishment
@@ -1953,7 +1953,7 @@ exports.commands = {
 		this.add('|unlink|hide|' + userid);
 		if (userid !== toId(this.inputUsername)) this.add('|unlink|hide|' + toId(this.inputUsername));
 
-		const globalReason = (target ? `: ${userReason} ${proof}` : ``);
+		const globalReason = (target ? `: ${userReason} ${proof}` : '');
 		this.globalModlog("BAN", targetUser, ` by ${user.userid}${globalReason}`);
 		return true;
 	},
@@ -2450,41 +2450,44 @@ exports.commands = {
 	blacklist: function (target, room, user) {
 		if (!target) return this.parse('/help blacklist');
 		if (!this.canTalk()) return;
-		if (toId(target) === 'show') return this.errorReply("You're looking for /showbl");
+		if (toId(target) === 'show') return this.errorReply(`You're looking for /showbl`);
 
 		target = this.splitTarget(target);
 		const targetUser = this.targetUser;
-		if (!targetUser) return this.errorReply("User '" + this.targetUsername + "' not found.");
+		if (!targetUser) {
+			this.errorReply(`User ${this.targetUsername} not found.`);
+			return this.errorReply(`If you want to blacklist an offline account by name (not IP), consider /blacklistname`);
+		}
 		if (!this.can('editroom', targetUser, room)) return false;
 		if (!room.chatRoomData) {
-			return this.errorReply("This room is not going to last long enough for a blacklist to matter - just ban the user");
+			return this.errorReply(`This room is not going to last long enough for a blacklist to matter - just ban the user`);
 		}
 		let punishment = Punishments.isRoomBanned(targetUser, room.id);
 		if (punishment && punishment[0] === 'BLACKLIST') {
-			return this.errorReply("This user is already blacklisted from this room.");
+			return this.errorReply(`This user is already blacklisted from this room.`);
 		}
 
 		if (!target) {
-			return this.errorReply("Blacklists require a reason.");
+			return this.errorReply(`Blacklists require a reason.`);
 		}
 		if (target.length > MAX_REASON_LENGTH) {
-			return this.errorReply("The reason is too long. It cannot exceed " + MAX_REASON_LENGTH + " characters.");
+			return this.errorReply(`The reason is too long. It cannot exceed ${MAX_REASON_LENGTH} characters.`);
 		}
 		const name = targetUser.getLastName();
 		const userid = targetUser.getLastId();
 
 		if (targetUser.trusted && room.isPrivate !== true) {
-			Monitor.log("[CrisisMonitor] Trusted user " + targetUser.name + (targetUser.trusted !== targetUser.userid ? " (" + targetUser.trusted + ")" : "") + " was blacklisted from " + room.id + " by " + user.name + ", and should probably be demoted.");
+			Monitor.log(`[CrisisMonitor] Trusted user ${targetUser.name}${(targetUser.trusted !== targetUser.userid ? ` (${targetUser.trusted})` : '')} was blacklisted from ${room.id} by ${user.name}, and should probably be demoted.`);
 		}
 
 		if (targetUser in room.users || user.can('lock')) {
 			targetUser.popup(
-				"|modal||html|<p>" + Chat.escapeHTML(user.name) + " has blacklisted you from the room " + room.id + (room.subRooms ? " and its subrooms" : "") + ".</p>" + (target ? "<p>Reason: " + Chat.escapeHTML(target) + "</p>" : "") +
-				"<p>To appeal the ban, PM the staff member that blacklisted you" + (!room.battle && room.auth ? " or a room owner. </p><p><button name=\"send\" value=\"/roomauth " + room.id + "\">List Room Staff</button></p>" : ".</p>")
+				`|modal||html|<p>${Chat.escapeHTML(user.name)} has blacklisted you from the room ${room.id}${(room.subRooms ? ` and its subrooms` : '')}. Reason: ${Chat.escapeHTML(target)}</p>` +
+				`<p>To appeal the ban, PM the staff member that blacklisted you${(!room.battle && room.auth ? ` or a room owner. </p><p><button name="send" value="/roomauth ${room.id}">List Room Staff</button></p>` : `.</p>`)}`
 			);
 		}
 
-		this.addModAction(`${name} was blacklisted from ${room.title} by ${user.name}. ${(target ? ` (${target})` : ``)}`);
+		this.addModAction(`${name} was blacklisted from ${room.title} by ${user.name}. ${(target ? ` (${target})` : '')}`);
 
 		let affected = Punishments.roomBlacklist(room, targetUser, null, null, target);
 
@@ -2492,18 +2495,18 @@ exports.commands = {
 			let acAccount = (targetUser.autoconfirmed !== userid && targetUser.autoconfirmed);
 			let displayMessage = '';
 			if (affected.length > 1) {
-				displayMessage = "(" + name + "'s " + (acAccount ? " ac account: " + acAccount + ", " : "") + "blacklisted alts: " + affected.slice(1).map(user => user.getLastName()).join(", ") + ")";
+				displayMessage = `(${name}'s ${(acAccount ? ` ac account: ${acAccount},` : '')} blacklisted alts: ${affected.slice(1).map(user => user.getLastName()).join(", ")})`;
 				this.privateModAction(displayMessage);
 			} else if (acAccount) {
-				displayMessage = "(" + name + "'s ac account: " + acAccount + ")";
+				displayMessage = `(${name}'s ac account: ${acAccount})`;
 				this.privateModAction(displayMessage);
 			}
 		}
-		this.add('|unlink|hide|' + userid);
-		if (userid !== toId(this.inputUsername)) this.add('|unlink|hide|' + toId(this.inputUsername));
+		this.add(`|unlink|hide|${userid}`);
+		if (userid !== toId(this.inputUsername)) this.add(`|unlink|hide|${toId(this.inputUsername)}`);
 
 		if (!room.isPrivate && room.chatRoomData) {
-			this.globalModlog("BLACKLIST", targetUser, " by " + user.userid + (target ? ": " + target : ""));
+			this.globalModlog("BLACKLIST", targetUser, ` by ${user.userid} ${(target ? `: ${target}` : '')}`);
 		}
 		return true;
 	},
@@ -2634,7 +2637,7 @@ exports.commands = {
 		}
 
 		let soonExpiring = (cmd === 'expiringblacklists' || cmd === 'expiringbls');
-		let buf = Chat.html`Blacklist for ${room.title}${soonExpiring ? ` (expiring within 3 months)` : ``}:<br />`;
+		let buf = Chat.html`Blacklist for ${room.title}${soonExpiring ? ` (expiring within 3 months)` : ''}:<br />`;
 
 		blMap.forEach((data, userid) => {
 			const [expireTime, ...alts] = data;