What is something that's constantly brought up on reddit, but you never encounter in real life ?

For me it's social justice warriors. Whenever sexism, racism, homophobia or transphobia is discussed, you betcha someone will post that "totally hilarious" copypasta about identifying as a attack helicopter.

I know one guy who maybe, sort of fits the description, but even that's a stretch. And he never says anything in real life, he just posts weird rants on facebook..