The social media cat is out of the bag. Mob justice is, unfortunately, the purest form of democracy, untempered by government or constitution or other forms of control. The only paths forward are to live with mob justice or to enforce actions against free speech and expression (ie making it illegal to cancel someone on the institution side, or make it illegal to participate in a social media mob on the user side, or make it illegal to host a social media mob on the social network side). I don’t see those happening.