On the Internet you get a Covington Catholic school incident every other day. There's lots of extreme accusations (racism, homophobia, sexism etc) thrown around with little backing evidence. I think Jonathan Haidt explains it best, where the barrier to communication has moved from "reasonable person" standards (if someone says something that could be construed as extreme/hateful you give them the benefit of the doubt but get them to clarify) to "most sensitive person in the room" standards (anything that could be offensive, even if its not intended at all, is construed as the person being some horrible monster). It leads to extreme self censorship because people are scared to talk in case they something that could be taken out of context, treated uncharitably and used to whip up a twitter mob. Coming from a moderate position it seems to me that this has had a chilling effect on debate and lead to the public square being dominated primarily by the extremes of both sides.