@mempko That's a high bar though. Most people would agree that that is an uncontroversial block. My bar is much lower.
My bar is down around: "Complete stranger on the bus with Opinions, you seem somewhat unpleasant. I can press this one weird button and never hear from you again."
To some people, I am that unpleasant stranger! They should absolutely block me. If they think we would not enjoy each other's online company, they are probably right.