There are places where this stuff is circulated. A lot of it looks like cartel and tribal violence overseas.
That said, the person or entity posting is likely from a region where the authorities will introduce themselves to you for posting expressly illegal things regarding children.
Most of the time when those types of attacks occur, it is from somewhere jurisdiction is a bit of an issue. We had plenty of special forces tied up in endless wars in the sandbox who might be able to go do things that we never did to people who do bad things, though.