Happened to a friend of mine just today, he RDPed into his home computer to check his auctions and play some Hearthstone. Woke up today to banned cause of hacking.
The blizzard ban system strikes again, and most likely they wont listen.
Now he's stuck with a pre ordered copy of Diablo 3 Expac on a banned account.
CASH GRAB BLIZZARD =)
Be Wary everyone, the auto banning system can take away all your games instantly and without any real way to appeal.