I’m not a prude by any means…
… but they’re currently allowing communities dedicated to loli content. I just had to block a community that had titles like “after the rape” and containing animated material depicting minors.
I don’t know about others, but I don’t want that shit in any way coming across my feed when I try to look at All.
And clearly anyone who does want to browse other NSFW communities is free to make an account on those instances.
One concern is paper trail. I personally don’t want traffic pointed at dicey material involving depictions of children seemingly making its way to my personal computer. Depending on ones country, there may even be a risk of legal repercussion. This problem is compounded by a user (AFAIK) being required to actually click into and view the community in question, to then block it.