Well, that’s kinda the point. Blizzard literally made it not a part of a GM’s job anymore to do so. In favor of the heuristics analysis and the Warden software, for the semi-annual banwaves.
This is from March 11 this year. Look at the responses by people. They really only do enough to make it seem like something is being done, while not actually doing anything meaningful at all. Has been like this for far too long.
(It’s just that the “world” of retail is larger and there are a lot more instances to choose from, and they split up people into randomized cross-realm zones & shards, so you don’t notice the problem is the same over there. Not to forget the cheaters in rated PvP over the years, they were left to do their “thing” for so long inbetween the banwaves. There were also known wintraders getting season titles like glad and so on as well, so Blizzard’s policing efforts can only be described as “only doing enough to make it seem like things are being done”.)