There is a proposal to create Blockchain Cops whose duties will be to track down those sort of people and hand them over to their countries's cops.
Well first my opinion on this Youtuber, who I might have watched once or twice before in the past, can't remember. I don't like what his doing. This doxxing thing is just plain creepy. And could possibly be illegal if all those info were not completely public.
As for the Bitcoin Police, who would regulate them? It could end up just as like a doxxing match between teens. I've heard incident of Youtubers themselves getting doxxed (like the oft hated Behind The Meme, where they threatened his grandma). I suppose the community could get by with volunteerism but then there should at least still be guidelines.