Forced Chat Filter/Block
There are plenty of games that use this feature, where you say something that is part of a filtered list. This replaces the current list of words you shouldn't say by not sending your message and message packets to the server. A message in the chat would say something along the lines of "Word(s) contained are forbidden by our Terms of Use." or something along those lines. Having this would filter out a lot of the extreme directs and keep the game a lot cleaner. Sure there are ways to get around it but IFS would make it so most of this is at least punished for if evaded. Quite a few of players are banned for saying the wrong thing, so why not prevent them from saying it all around?