Sometimes it's something more simple than all of the above theories. Maybe you missed a tell from a GM who was investigating a report of your multiboxing. You're questing, doing your thing, he watches and after not getting responses from you, decides you are botting and bans you. On the other hand, it probably was a GM unfamiliar with MBing who didn't try to find out what was up. The really bizarre thing is, after MBing on 2 servers, it seems like a majority of people I encounter know MBing when they see it, even though it isn't very common on either server. You'd think this would be something they "train" GMs on. Of course, it could just be that at about 10 bucks an hour, the average in game GM just doesn't give a hoot about investing time to research anything....