I think it is important to remember too that some topics are TOTALLY unacceptable on any portion of the site:

-Pedophiles talking about abusing or wanting to abuse others
-Abusers of any kind discussing ways or graphically explaining abuse they have perpetrated.
-Discussion of a member in directly negative terms when that member is not there to defend themselves(and really, even if they are, take it up in private)
-Rude, or mean actions to others in chat

again, if you are questioning something, dont get involved although you may want to. Copy the chat, send it off to one of the mods. Getting yourself mucked up in it usually never goes well. If you want to say something you can simply say you dont feel this chat follows guidelines and you cant stay.

I hope that makes sense.