I've heard of people being banned then allowed back. Somebody that Cav used to talk to all the time did, I think. I can't remember her screen name, but her real name was Carolyn. You know who I'm talking about?
Yeah - I know who you are talking about... Yes... you're right... you can ask for permission to come back, and sometimes it's granted. She had had a long history here, and was banned in a very personal dispute. I know of a couple others. It's a judgment call, pays to be nice to the hosts!