I think "block them and move on" is a good way to treat it excessive posts about spiderman or eyeliner or flashlight reviews.
But that attitude misunderstands the problem with bigoted posting.
It isn't that is does direct harm to "offended" viewers. It's that it spread shitty, wrong views to passive, opinionated viewers. Anyone who would block is not the target audience anyway. And some of us who would block need to keep an eye on what's going on.