isabeau hasn't been banned, she changed her nick. With ceegee and benz..well. it was a chat ban that became, by default, applicable on the forums. an, eh, knotty issue, better ask an Admin if you want to know more (I have my knowledge from ceegee herself and from a Mod)

I would agree that the rules for banning could be made clearer however, and IMO it seems (from scrolling back a bit to the times before I joined) that a few years back, people got banned sometimes for doing story/RP material (here on the forum, not on the library pages proper) that would not merit a ban now (e.g. realistic rape and brutalizing seen as RP or fantasy, not as reality)