Prevent new users with username 'all'

server/methods/getUsernameSuggestion.coffee

@@ -5,6 +5,10 @@ slug = (text) ->
 usernameIsAvaliable = (username) ->
 	if username.length < 1
 		return false
+
+	if username is 'all'
+		return false
+
 	return not Meteor.users.findOne({username: {$regex : new RegExp(username, "i") }})
 
 @generateSuggestion = (user) ->