diff --git a/src/discord-commands.js b/src/discord-commands.js
index 3e4646a..c97e8e9 100644
--- a/src/discord-commands.js
+++ b/src/discord-commands.js
@@ -5,6 +5,8 @@ const Discord = require('./discord.js');
 const DiscordHelpers = require('./discord-helpers.js');
 const DiscordEmbed = require('./discord-embedbuilder.js');
 
+const CATV = require('./harmful.js');
+
 let Commands = [];
 
 let GuildsAndPrefixs = [];
@@ -14,6 +16,7 @@ module.exports.registerCommands = async function()
     Logger.info('Registering commands');
 
     Commands['initserv'] = { command: 'initserv', alias: 'nil', name: 'Initialize Server', desc: 'Initialises a new Guild', callback: InitializeGuild, adminOnly: true };
+	Commands['bedecent'] = { command: 'bedecent', alias: 'nil', name: 'Be decent', desc: 'Makes someone\'s nickname decent', callback: NeutralizeBadNickname, adminOnly: true};
     Commands['setprefix'] = { command: 'setprefix', alias: 'prefix', name: 'Set Prefix', desc: 'Sets the servers prefix for the guild', callback: SetPrefix, adminOnly: true };
     Commands['setfallbackchannel'] = { command: 'setlogchannel', alias: 'setlogchannel', name: 'Set Log Channel', desc: 'Sets the guild log channel to the current channel', callback: SetLogChannel, adminOnly: true };
     Commands['me'] = { command: 'me', alias: 'nil', name: 'Me', desc: 'Returns the users profile on the logori site', callback: MeCommand, adminOnly: false};
@@ -157,3 +160,22 @@ async function MeCommand(message, args)
 {
     DiscordHelpers.SendMessageSafe(message.channel.id, `All of your data can be accessed here: https://logori.xyz/api/v1/user/${message.author.id}`);
 }
+
+async function NeutralizeBadNickname(message)
+{	
+	if (message.mentions.length < 1)
+	{	
+		Discord.bot.createMessage(message.channel.id, 'You must provide a user');
+		return;
+	}
+
+	let member = message.channel.guild.members.find(m => m.user.id === message.mentions[0].id);
+	let ident = member.nick && member.nick !== '' ? member.nick : member.username;
+	try 
+	{
+		await member.edit({
+			nick: CATV.neutralizeHarmfulIdentifier(ident)
+		});
+	}
+	catch (e) {}
+}
diff --git a/src/discord-events.js b/src/discord-events.js
index 2b4792b..bcb4659 100644
--- a/src/discord-events.js
+++ b/src/discord-events.js
@@ -7,6 +7,7 @@ const DiscordHelpers = require('./discord-helpers.js');
 const DiscordEmbed = require('./discord-embedbuilder.js');
 
 const ADJSCore = require('./ajds-core.js');
+const CATV = require('./harmful.js')
 
 const Eris = require('eris');
 
@@ -27,7 +28,7 @@ module.exports.setup = async function()
     Discord.bot.on('guildEmojisUpdate', async (guild, emojis, oldemojis) => {GuildEmojisUpdate(guild, emojis, oldemojis)});
     Discord.bot.on('guildMemberAdd', async (guild, member) => {GuildMemberAdd(guild, member)});
     Discord.bot.on('guildMemberRemove', async (guild, member) => {GuildMemberRemove(guild, member)});
-    Discord.bot.on('guildMemberUpdate', async (guild, member, oldmember) => {});
+    Discord.bot.on('guildMemberUpdate', async (guild, member, oldmember) => {}); // TODO(aosync): Check if new nickname is harmful. 
     Discord.bot.on('guildRoleCreate', async (guild, role) => {});
     Discord.bot.on('guildRoleDelete', async (guild, role) => {});
     Discord.bot.on('guildRoleUpdate', async (guild, role, oldrole) => {});
@@ -43,7 +44,7 @@ module.exports.setup = async function()
     Discord.bot.on('messageReactionRemoveEmoji', async (message, emoji) => {});
     Discord.bot.on('messageUpdate', async (message, oldmessage) => {MessageUpdate(message, oldmessage)});
     Discord.bot.on('presenceUpdate', async (member, oldprescence) => {});
-    Discord.bot.on('userUpdate', async (user, olduser) => {});
+    Discord.bot.on('userUpdate', async (user, olduser) => {}); // TODO(aosync): Check if new username is harmful. Set nickname if yes.
     Discord.bot.on('voiceChannelJoin', async (member, newchannel) => {});
     Discord.bot.on('voiceChannelLeave', async (member, oldchannel) => {});
     Discord.bot.on('voiceChannelSwitch', async (member, newchannel, oldchannel) => {});
@@ -562,6 +563,20 @@ async function GuildMemberAdd(guild, member)
     **AJDS Results:**
     *${AJDSScore.literalscore}*
     ${WarningString ? WarningString : ''}`);
+	
+	if (CATV.isIdentifierHarmful(member.username))
+	{
+		embed.field('Username harmfulness', `This member's username is considered harmful.`);
+
+		// How to disable this? Just remove nick management permission haha.
+		try 
+		{
+			await member.edit({
+				nick: CATV.neutralizeHarmfulIdentifier(member.username)
+			});
+		}
+		catch (e) {}
+	}
 
     // embed.field('​', `${member.mention} is ${AddOrdinalSuffix(DiscordHelpers.GetMemberJoinPos(member.id, guild))} to join`);
 
diff --git a/src/harmful.js b/src/harmful.js
new file mode 100644
index 0000000..46b2e40
--- /dev/null
+++ b/src/harmful.js
@@ -0,0 +1,25 @@
+/* 
+	To all of which I do solemnly and sincerely promise and swear, without
+	any hesitation, mental reservation, or secret evasion of mind in me
+	whatsoever; binding myself under no less a penalty than that of having
+	my throat cut across, my tongue torn out, and with my body buried in
+	the sands of the sea at low-water mark, where the tide ebbs and flows
+	twice in twenty-four hours, should I ever knowingly or willfully
+	violate this, my solemn Obligation of a Javascript user.  So help
+	me God and make me steadfast to keep and perform the same.
+*/
+
+module.exports.isIdentifierHarmful = function(ident)
+{
+	return !(/^[a-zA-Z0-9_][a-zA-Z0-9_!?-]{3,20}$/.test(ident));
+}
+
+module.exports.neutralizeHarmfulIdentifier = function(ident)
+{
+	let base = ident.replace(/[^a-zA-Z0-9_]/g, '');
+	if (base.length > 20) base = base.slice(0, 20);
+	while (base.length < 3) {
+		base += `${Math.floor(Math.random()*10 + 0.5)}`;
+	}
+	return base;
+}