The president-elect of the United States is a notorious troll — a fact which his promise to ban Muslims from entering the country, threat to imprison and strip Americans of citizenship for exercising their First Amendment rights, and widespread insulting of people online all make clear. We now learn via Slate that the two technology platforms Donald Trump uses most prominently to spread his messages of hate and division, Twitter and Facebook, take a very different stance on how to respond to future instances of harassment by Trump. Namely, Twitter says it would consider suspending his account. Facebook, which CEO...