The ethics here are very questionable. Wtf - you just find some dude, based on no real evidence, then you "out" him for something that's not criminal and give the internet trolls his whereabouts? What could be more "yellow press"? I really wish their ass got sued.
The internet trolls are the least of his concerns; when you're possibly worth 400 million, you need to worry about criminals. You're a target. That story put his life in danger.
Snarky, but the IRS isn't a danger, they'd need to see evidence of a vast fortune before wanting to tax it. Given his lifestyle, they wouldn't look twice at him.
