All of that might be true, but the end result is that the social media feed for all politicians will be dominated by crazy people yelling at each other, and the

All of that might be true, but the end result is that the social media feed for all politicians will be dominated by crazy people yelling at each other, and the politician won't participate and nobody normal will read it. Basically the same as comments on newspaper articles, really. Any unmoderated forum is going to be worthless as a forum. That might be the constitutionally mandated outcome, but it's probably preferable to just not allow comments at all.