I'm sure SE is working on this. The last 2 notices for bans (Oct 27th @ 14567 and Nov 4th @ 19980) have been the 2 largest weekly bans since the launch of 2.0.
Either SE has stepped up their ban efforts in the last couple weeks, the bots are out in stronger force than ever before, or a combination of the two. Either way the ban hammer is swinging more right now then it ever has.

Since the launch of 2.0, 129750 accounts have been banned for advertising alone, and the number for actual botting is....I haven't had the motivation to sum that up, but it's bigger ><