I have always wondered though, what would happen if someone took Blizzard to court over getting banned. It would only be able to be small claims court really, but given that we pay in advance and get no refund if banned it could be possible for someone to take them to get a refund and use that as a way of getting info on what they were banned for or how they were detected.

If Blizzard fell back onto the "we can ban you if we feel like it for no reason" then one would assume that there should be a pro-rata reimbursement of money paid in advance since they just decided to discontinue their contract with you through no fault of your own, while if they banned someone for exploiting then it wouldn't be unreasonable for someone to decide to take them to small claims to get a refund or for Blizzard to prove they exploited and it's during that phase that info could be gleaned.

I'd assume though that in either of these situations, Blizzard would just pay up to avoid the hassle, legal cost and potential for info leaks...but it would be an interesting scenario.

Actually, now I think about it, I'm surprised that details about Blizzard's investigation techniques and bot discovery tools haven't leaked already from the Glider case unless they haven't entered the discovery phase yet.