It's not about "harmful to society" in this case, but more "illegal, attracting attention from entities that make hosting the service much more painful and diff

It's not about "harmful to society" in this case, but more "illegal, attracting attention from entities that make hosting the service much more painful and difficult". More than once, I've had thoughts about developing some sort of discussion platform, but binned it because the thought of hosting it and having to deal with the not-fun problems of reducing spam and handling illegal content made it entirely untasteful. At least spam reduction can be done entirely on my own terms, but illegal content requires me to then coordinate with external companies or agencies, report content, figure out how to deal with and purge the content (or quarantine and hang onto it hand it over when requested), and live with the the pain of having to field DLNAs and other copyright claims. I obviously have different feelings about piracy than I do about CSAM, but from a hosting perspective, both are just big pain points that make hosting a service where people can share non-text content a pain in the ass.