I remember artist tumblr in the 00's. Participated, then moved over to twitter in the 10's before I got sick of it. This looks like another continuation of that same community.
They can do what they like, but this reeks of the exact same kind of drama and mobs that, for example, drives fanartists to attempting suicide because they painted a character's skin a shade too light. (Zamii070, if you're curious.)
These sorts of communities form an echo chamber that, frankly, can be absolutely horrible for kids. Yeah, they can do what they want in their house, but I'm staying far the fuck away.
For laymen who might not know how GANs work:
Two AI are developed at the same time. One that generates and one that discriminates. The generator creates a dataset, it gets mixed in with some real data, then that all of that gets fed into the discriminator whose job is to say "fake or not".
Both AI get better at what they do over time. This arms race creates more convincing generated data over time. You know your generator has reached peak performance when its twin discriminator has a 50/50 success rate. It's just guessing at that point.
There literally cannot be a better AI than the twin discriminator at detecting that generator's work. So anyone trying to make tools to detect chatGPT's writing is going to have a very hard time of it.