How do I block an entire instance?

I'm getting really really sick of blocking dozens of communities from lemmynsfw every single day. It never ends ffs.

If I want porn, I'll go looking for porn. It shouldn't be every third post in my feed.

Honestly, how is anyone supposed to join Lemmy if they all just get flodded with mountains of porn??? I can't imagine anyone that's not already invested in being here wanting to join. (unless their looking for a pornhub alt I guess...)

Not everything NSFW is porn and I'm not looking to remove non-porn so permanently hiding everything tagged NSFW isn't a solution.