Lex Fridman is a guy who talks about being open minded and humble then proceeds to block everyone that doesn't share the same set of opinions. Seems only capable of asking the same set of questions as well.
Just saw a tweet thread a couple of days ago and this question reminded me of the last tweet: https://twitter.com/Tweetermeyer/status/1341587206285053963 where a writer for The Drive and few others got blocked for questioning his research into Tesla's Autopilot safety
I'm not exactly going to curate a list of blocks. All I will say is make any constructive criticism towards him, or one of the things he seems to love such as Musk and chances are you will be blocked. He seems to even block other researchers who have never interacted with him.