This. I remember many a time pmarca getting so upset and just blocking everyone who disagreed with him on Twitter. It was the weirdest thing.

Blocking people that annoy him on Twitter is the only humanizing thing about him. Deciding that someone has annoyed you enough on that platform that you don't care to ever hear from them ever again is the only thing that made that platform usable when you have any minimal audience.

"I've known you for all of 10 seconds and enjoyed not a single one of them" followed by blocking is good, actually. That doesn't make you any more correct or wrong, of course.