It's not too hyperbolic to say that WW3 could be started on a platform like Twitter. Having a "shutdown" button doesn't seem that extreme when essentially the entire site seems to be compromised. I'd bet my bottom dollar that Congressional hearings are going to happen.
It hasn't gotten so far that heads of states end up in angry loops of escalation (yet). Luckily the only 2 hotheads in that position are Trump and Kim Jong-Un, I would argue and they seem to get along.
