there seems to be an issue with blocking communities. i've blocked a number of communities containing content i'm not interested in but they recently started showing up in the Local feed, such as https://lemmynsfw.com/?dataType=Post&listingType=Local&page=1&sort=New

i was indeed asking about the patch, thanks

speaking of, where does one find its source code?

as long as other instances haven't blocked federation with this instance you'll still be able to access it.
you will however need to find the communities first and subscribe to them to have them show up in your feed, as nsfw communities don't show up on other instances by default as far as i know.

!nsfw411@lemmynsfw.com is intended as a band-aid for this, but you can also visit this instance and find communities here directly and then sub from another instance.

https://lemmynsfw.com/post/25934

the workflow currently tends to include first searching for the community by url or by !community@instance and then visiting the community url on your instance by putting for example yourinstance/c/community@lemmynsfw.com in your address bar.

this instance also has a custom set of patches applied to make nsfw stuff more accessible to users, including those who aren't logged in.