In the limiting case, this requires the social media industry to implement a parallel judicial system, or else make everything hosted there immediately legible

In the limiting case, this requires the social media industry to implement a parallel judicial system, or else make everything hosted there immediately legible to the actual judicial system in a way that overrides any other system of visibility control. I'm not at all averse to imposing back on that industry the detriments it imposes on the society on which it feeds. I also don't think this or any other superficial solution of that problem is likely to net out better than the status quo.