I'd like to believe that there's already a sort of balance in place created by the fact that with enough evidence of someone doing something really really wrong

I'd like to believe that there's already a sort of balance in place created by the fact that with enough evidence of someone doing something really really wrong, even if that evidence couldn't be used in a court room, that can still be presented to the public who will use that information to reach something approaching justice. I'd like to think that if someone, especially someone in a position of power, were caught doing something truly evil that society would find an appropriate response regardless of some legal technicality and that there will always be someone willing to risk the personal legal consequences for letting the rest of us know about it. That that same risk of legal consequences would also prevent people from exposing others over trivial matters. I'm not sure that works out in reality though. We have lots of evidence of people who have done very terrible things but have fully gotten away with it, and plenty of evidence that society is as terrible at evaluating evidence as mobs are at coming up with just responses.