The U.S. has arrested two men for alleged leadership roles in 764, a well-documented group that targets children online, "coercing them into producing degrading and explicit content under threat and manipulation."

https://therecord.media/two-charged-with-crimes-connected-to-online-extremist-group

US arrests two alleged leaders of online extremist 764 group

An affidavit unsealed in Washington, D.C., alleges that the two “targeted vulnerable children online, coercing them into producing degrading and explicit content under threat and manipulation."