I mean it's just a small forum, can they really have the same amount of influence on the market than a hedge fund or a market maker? What does the SEC care about a bunch of trolls on the internet?
Coordinating with the goal of market manipulation (basically buy/sell/short/pump-and-dump/etc cartels or other) is illegal as far as I know. Hence why the guys who made a lot of money on the negative oil trades are staying very quiet.
