1) that seems basically fine, but also 2) non-commercial efforts run by hobbyists and gated from the general public ought to be Ok. If you want to run a PHPBB site and subject yourself to harmful garbage by letting randos write to your server, well, go nuts.

[edit] thought experiment: how many of the people making tons of money off Facebook—c-suite, major shareholders—would find some other way to make money if continuing to make Facebook mega bucks meant they had to do this 5 days a week? What would we think of any of them who chose “bring on the trauma, I want those sweet greenbacks” and kept it up for years?

I think there’s a difference that depends on scale and privacy. If your network is private (or something more akin to p2p / messaging) this is much less of an issue, especially if you have strong blocking controls. Users moderate themselves.

I think the problems that Facebook, Youtube, etc are seeing stem from the fact that the content is much more public, thus in much more need of moderation.