I am not a fan of pitbulls, neither the breed nor the artist with the similar name. However the proposed solution here doesn't work in reality because most of these owners aren't owners who have gone through any sort of proper process anyways. It's criminal activity all the way down, to put it bluntly. Illegal backyard breeders, illegal purchases, illegal actions. There's already financial disincentive there, and yet they persist.

Therefore if any solutions are to arise, it has to be more thorough than gentle nudges as that's only effective on those who likely wouldn't have bought a pitbull in the first place anyways due to the social stigma.