They also ban you for:
A) joining or leaving games too quickly or in a repeated fashion (killa gets Realmdowned for Baal runs all the time)
B) changing characters on a single account too quickly or in a repeated fashion (I get tempbanned for mule checking very frequently)
C) lagging (yes, lagging)
Warden (the online collective term for all of Blizzard's security measures, even though it functions solely as spyware, which is in turn used for detecting hacks and third party programs) is capable of banning IP, connection source, and CD-Key. You were either hit by the second or the third.







