I dunno, the browser lags when I scroll down it.
It's trivial to build huge ones up. This account is only as old as the reddit bullshit in 23, and I know I'm over a hundred at least.
Humans are assholes. On the internet, they don't work as hard to pretend they're not. And, they'll often go harder at it than anywhere else. So you block a lot if you want to avoid future interactions with the same asshole.