@eolach As a quick glance, FSE already falls afoul of "promoting self harm" (the UK Parliament should kill themselves) and depending on how toy define hate crimes, we might be illegal for that, too. Apparently there is an obligation to loginwall anything that has porn or bullying. I could get around the requirement to "filter out unverified users" by declaring everyone on FSE officially Verified. As far as the requirement to allow people to filter "content that does not meet a criminal threshold but promotes or encourages eating disorders or self harm, or is racist, anti-semitic or misogynistic", Pleroma comes with keyword-muting.

I believe it only applies to businesses and only past a certain threshold, though, and FSE meets none of the criteria.