I agree with et_cg on that one, look at hce.halomaps.org. There is no map there with any kind of profanity [I think mainly because Dennis (OK, fine, UXB) removes them]. Granted, there is one with nudity in it, but that's the secret room, and you can't stop them. I have not bought H2V yet, for 3 reasons:
1. Everyone I have talked to says it's exactly the same as the Xbox version, which I own. At least add in a couple more SP levels or something. Maybe a tiny preview of Halo 3.
2. Even if I didn't already have it for the Xbox, I've heard so many reports of bad framerate, and this entire thread full of 13 pages of bugs, that I wouldn't buy it until it was stable.
3. I also would like a fully unlocked HEK, which our good friend Kornman is providing for us (Thanks!). However, I would prefer to use the official one then the possibly illegal one, though I would currently go for the latter due to the lockiness.