Something similar happened here in Ohio a few years ago. I am not sure if there were lawsuits but there was a lot of whining about the poor “artist” lost.
Somehow, unlike other “artiste” who died poor and tragedly for their love of art,I doubt he will become famous.
No Paul Gaugin award for for him...
I always want to ask graffiti apologists if the hoodlums spray painted THEIR car or THEIR front door would they still call it “art”.