Imagine a stranger spreads lies about you. They tell people you're doing horrible depraved crimes. Would you just block them?

What happens when other people don't block them? When other people believe the lies and share them?

What if this turns into real life abuse and violence against you and your family?

This is what vulnerable groups face from bigots. Bigoted accounts need to be shut down, servers which refuse to remove bigots should be defederated.

"Just block them" doesn't work.