> They're going to heavily investigate everyone that made a half million on a super high volume, widely shorted stock in a time of extreme volatility?

These arguments all seem to be operating on the assumption that there would be a large number of day/swing traders who would exit their positions with perfect timing, but this is unlikely because they wouldn't have the knowledge that the price move was ephemeral and driven by a false rumor. The number of people who made a half million off it would be a lot smaller than you think.