IMHO based on my use of the fediverse, fundamentally it's about porn and curtailing unwanted porn in your domain. I'm a user of mastodon.social in the "wee US hours" (before US mods are awake) and run across a lot of hit-and-run porn being pushed to Trending (and I report, etc.).

It's a thing, it happens a lot and Lemmy instances have the same problems to fight. Unwanted porn in my eyeballs is sadly a not uncommon experience until you've put in effort to set up blocks and filters on your personal accounts. Peertube being explicitly video based is a natural target for porn pushers.