AFAIK it fights back, as it fights back to anything that attacks you. But if they start deciding to camp you, you will run back to your body over and over.
Works a charm!
Never had any real issues with the bot running.
I get attacked by another player sometimes, and most of the time the bot is victorious
If you do get camped.. Well.. Just move somewhere else!
Never really had the problem with being spawncamped with gb2. I once was with normal gb thought. He killed me like 70 times but I didnt recieve any bans and I manage to convince him that it was my 5 old kid playing lol. Anyways Ive been botting for ages on pvp realms without having problems. Never had any problems with gb2.
Some classes/cc are better against "real" players. The best I have seen so far is the shaman, with the marvelous ShamWow CC by bobby53.... It is a killing machine on world PVP... Very difficult to fight against. My experience with melee classes is not optimal, as they tend to be kited pretty easily.