Good joke
Except that they aren't getting banned. I've seen same player bot for months, reported him few times, GM confirmed that its most likely a bot that said they'll be "investigating". After few months he disappeared for a week. Guess got a short ban. Then back to botting.
During MoP gem and glyph markets on most big realms were controlled by bots. Blizzard's action? Nerf gems and glyphs.
In WoD same player was controlling craftable BoE mounts market by undercutting entire day within 1-2 minutes after someone else posts. Without even coming online. He was using remote AH bot. Even though remote AH has limit on number of posts, its high enough when dealing with small market, such as mounts market. Blizzard's action? Nothing.
Before someone says "AH bots don't exist", go google. You'll find plenty of them.
Why is it happening? Because AH interface is ancient. Undercutting, sniping, bids are all outdated concepts. AH needs to be rebuilt.