I’m glad you pointed out that Reddit gets a free pass. Aside from the fact that r/TheDonald flourished there, r/all regularly shows videos of people dying and men smacking women (r/pussypassdenied). There’s also a weird, self-congratulatory sense of community that leads to mob politics and pile ons in a way distinct from Facebook and Twitter. I think it means something that people identify as redditors, and not, say, as tweeters.