So, how many lemmynsfw.com communities have you blocked?
I just reached 112 myself.
I'm very much awaiting a time when users can block specific instances. I still don't want to check the option to hide NSFW content, because I do want to see NSFW content that may show up on non-porn communities. Just not really interested in seeing so much porn in All.
You can check on your settings page, btw, in the Blocks tab - count quickly with Ctrl+F.
Why block them? I like a little spice with my scrolling. Plus it's a fun mystery box to see what's under the blur. Straight/gay? Cis/trans? That one guy that literally just posts 100 fully clothed celebs every hour to disappoint you? Who knows.