i am using bossland bots (honorbuddy / demonbuddy) since several years... mostly full afk during sleep / work / whatever. sometimes 12-16h a day. the hardest thing i ever got was a 3 day ban in warcraft because the pvp profile was crap an the bot ran against the wall the whole battleground ^^
i had not even 1 account banned (except the 3 day ban for exploiting the game).
the only thing i almost try to take care of is to be not with much ppl (e.g. singlefarming in wow or playing alone in diablo, no group botting!). funny side of all of this is that the bot in wow was mostly always ranked #1 in pvp matches, playing far better than any human xD