The quintessential usenet newsgroup. Full of spam, profanity, kinky sex, and all sorts of other stuff that make conservatives and university administration see red. If you were actually interested in bondage, you either needed to be patient or to have a very good killfile. A very good killfile.
To solve the problems associated with being in the alt hierarchy, there's now soc.subculture.bondage instead, where rules and netiquette can be enforced.