If you read most of the blogs, you can see that they are building in a lot of security measures, and I know that they will build in quite a few features in that will either stop you from using trainers, cheats etc, and keep "pirates" out.
I have used the Starcraft 2 trainer here in singleplayer and co-op since release and i have yet to be banned ?
The legal version ofcourse and have all achievements unlocked, let them ban me i got what i came for in sc2.
As for Diablo 3 it will be the first i wont buy.
[Edited by sauced, 11/22/2011 3:48:01 AM]