Are you saying it can’t be proven so it doesn’t exist.
That is the same as saying there were no cross-burnings and lynchings because the KKK were ghosts and ghosts don’t exist.
Clandestinity, subterfuge, and passive aggression still exist even if the perpetrators don’t write a signed confession with multiple forms of ID and send it to a judge. How did the mafia ever get prosecuted or phantom unattributable cyber criminals?