Nostalrius Begins - Quality wow vanilla realm (1.12)

Hello,

my Char: Vertom on PvP Realm

I just got banned? I was AFK and when i went back and wanted to kill some boars with my ultra-damage-dealing-level-10-hunter I got a disconnect.
When i want to login, I get a message that I was banned. But I dont unterstand why?

Thank you!
Vertom

Greetings,

Account banned for hacking.

Best regards.