Once things have quitened down why not create a "Gutter Forum" its done on other boards. You have to apply for access from admin, and basically anything goes. Non work safe jokes, pictures, stories etc.
gutter forum sounds like an idea.. with an over 18 age restriction in it.. then is someone does feel the need to spout or post profanities then no under 18s would have to see it.. not to say that all would do it there though i guess
I've seen it used before and it caused nothing but trouble. I mean serious trouble. It made the main WFC boards look like tellytubby land! I'll consider it but I'd have to have a chat with some of the admins at the place where it all kicked off and ask for their advice, (I'm not scared to ask). Call it a maybe.
admin when it comes round to thinking about it PM me and i will show you a well moderated site that it is in use on. They also use VB so may give you some ideas etc as well