@Dixxy:
Well, let's see:
-he pretty much called the entire forum "a bunch of fucking whores"
-He had a post consist entirely of the word "fuck"
-he said "fuck off and die" (and I'm pretty sure it was directed at me)
amongst other things.
Looking at the 3rd one?
If it was directed at me and I was a mod or admin, he's be IP banned before he could be redirected back to the post.
I can't stand disrespect to authority when I'm the authority. Well…I'll tolerate it a bit. But that message is clearly offensive, and the mods/admins are there to keep order, not be yelled at. While you don't want to make it seem to other forum users that you'll ban someone for looking at you funny, but at the very least that deserves a suspension for numerous reasons. Pick one that fits your morals:
Cussing at Authority
Disrespecting the Mods/Admins
On top of that, I would consider it part of my duty to make sure anyone that says something that offends the entire forum community would be punished. Insulting what at least 100 or maybe even 1000 members (assuming it's a small to medium sized forum) is pretty rude, and it's aimed at anyone who checks in on the board.
The middle one really isn't a problem, unless you have a rule against profanity or strong profanity.
Basically, it's your duty to show everyone that you'll keep the peace, and not be walked all over as the admin. If you let the first one slide, you're saying your fine with everyone being insulted. The other one is telling people you can be walked all over. Delete the posts, suspend him, and if he comes back and you find out he's the same guy from earlier, then ban his IP again. Eventually he'll run out of places to log in to.