I'm not sure how having one's ability to buy a stock taken away says anything but bad things about the world.
And it’s always been considered market manipulation to coordinate groups of investors to make the same trade, since the 1920s. I don’t think anything done on WSB crossed the line but it was in the vicinity.
The only clearly illegal acts were committed by DeepF**ingValue, since he had special obligations as a heavily licensed broker and brokerage firm employee while making his tout videos.