I'm sorry you guys got ambushed in chat. Also ... appologies to those who sent PMs asking for my help. I wasn't here and just read them a few minutes ago.
I don't have the ability to block users from the board or from chats. Admin can block users from the board ... i don't know if he can lock folks out of the chatroom. It would be difficult in any case because there are only the two of us, so we can't "work" the board 24/7.
the only two "solutions" i can think of are to either ignore intruders or for everyone to leave the chat. neither of those are helpful suggestions, though, are they? sorry.
idiots like the one who harrassed you last evening get their thrills from the horrified reactions of the people they're pestering. i have a feeling that if you fight the urge to respond ... just continue talking to each other as though you hadn't even noticed that "person" ... they'd get bored and go away.
if i find out there's another way to deal with them, i'll let you know.