[mojo]

You agree that you will notuse the YorkieTalk Forums to post any advertisement or other commercial message except expressly allowed by YorkieTalk. You agree that you will not post any knowingly false, defamatory, inaccurate, abusive, harassing, obscene, sexually oriented, or threatening message or material that is illegally invasive of another person’s privacy.

Ok, I know I will be bashed here, but that's ok. For the record, I did not go to the sex thread, was not interested and never posted on it. It just seems to me that you are taking the rules out of context and seeing what you want them to say.
It doesn't say you can't post it, it says it can't be illegally invasive of anothers privacy which that thread was not.