Nostalrius Begins - Quality wow vanilla realm (1.12)

I was just questing in the barrens on my orc warlock, Urimao, killing lions and got kicked out of the game. I tried to log back in and it said I was banned. I would appreciate if I could get some clarification on the reason I was banned. Thanks.

EDIT: No reply but now my SECOND account (Character name Garrof) has been banned too! I don't see why this is happeneing. I don't have any addons or anything so it shouldn't be interfering with the servers or my account. I've never been banned on live servers and I haven't done anything differently here.