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.
I’ve found it much more effective to ban the spam posters / bot posters in general, instead of communities. That catches the worst of it and mostly eliminates all of the cross posting.
If you see them or anyone spamming on LemmyNSFW, please report them.
Our definition of spam may be different. I think of it on a personal level as “this guy / bot just cross-posted the same thing to five different communities within two minutes.” Others wouldn’t define that as spam.