FStoppers, for instance, was started by people named Patrick Hall and Lee Morris. It probably has a whois lookup and may well be incorporated in some jurisdiction.
Jodie Oette is in the MD/DC area, sort of borderlike. Also, apparently, publicly advertising and likely incorporated.
Petapixel was founded by, and the article written by, Michael Zhang...
...any of these people can have any kind of accusation made by an anonymous throwaway.
Start hitting, or get more of this. The art itself is not remotely risque and it's a stretch to call most of these people "children"... but so what?
Hit or get hit, dumbass. This is your fault by this point.