There is a ban thread. But from my experience here none to a few. The dev team does an amazing job at keeping us safe.. But remember, never bot with an account that you can't afford to lose.
As long as you mix it up on a toon you will be ok. don't have your toon just sit in dal or w/e and q for pvp or ib do a little of everything. do a couple dailies and maybe a instance or bg then turn on your bot so warden 2.0 doesn't pick up on the repetitive play style i guess you could say. Also dont use default cc if your going afk and make sure you watch your toon do a full run of a profile b4 you leave it to grind. You do all this you got a 5% chance of getting banned. You are careless you got 100%