I have a few older botting accounts that are currently frozen (due to sub running out - all 24/7 suicide accounts that survived) and they are all fine. Last time I had one of these accounts activated was a few weeks ago. I think whatever blizzard has changed in their detection it is a very recent change (I would say up to 4 weeks ago). They must've hot fixed it even a few days ago! who knows!
i seem to have dodged it by getting bored with the game and taking a few months off recently && fingers crossed
My brother who was botting last night did not get banned either. I called him up as soon as I saw my account banned and told him to lay low.
