Too many people have peed in the pool
I have a theory about FB and Twitter -- or maybe more of an observation. Anyway, back in the stone age, people had bumper stickers with little slogans on them. And in the break rooms of various places of work, there was always a bulletin board an on a corner of it there was always some faded-from-to-many-xeroxes bit of humor/racism/sports fandom/sexism/dirty joke or other us-vs.-them thing on it that people would look at and amuse themselves with.Now thanks to Twitter and FB, these little types of tribal territorial markings are just about all that's left of public discourse.I see things get passed around and think, 20 years ago this would have been mimeographed and hung on a  break room bulletin board, where it might have acted as a crude conversation starter about some aspect of "who are we?". But now people consider sharing and liking these things as their /contribution/ to a conversation.It's like the way that millennials communicate with emoji, except it's image macros and memes and slogans and "gotchas" and hot takes that we consume, copy, and share. The copying and sharing of all that stuff is what passes for discourse now.Me, I think that this development is double-plus bad.