The problem is that judgment of the crowd will throw anyone under the train at any time and for any reason. We know of many a proud SJW that made a misstep at some point and was hunted down all the same by their previous friends, because you can be perfect only to a point; first you'd laugh and feel some schadenfreude, but...

There are actual reasons why we instituted things such as a judicial system, principles like "you'll be deemed innocent until proven guilty", etc.