*Question/answer inspiration: http://en.lichess.org/forum/lichess-feedback/are-the-lichess-forums-targeted-at-an-adult-audience
^^^ Read that, but some general guidelines that are not set in stone:
- You can talk about whatever you want in the off topic forum provided (1) it's not attacking/hating/indecent (towards/against) someone/etc; (2) it doesn't violate anyone's privacy (ex: don't post your ex-girl(boy)friend's embarassing selfies); (3) it's a redirect to an adult content site (4) no viruses, spyware links, etc.
- Just use common sense before posting.
Also, note that these are simply informative guidelines and are in no way official. A mod can delete your post if it's causing a negative atmosphere.