You're right, he has received his "15 minutes of fame", good or bad. Actually, he isn't an artist, he is a sign painter. period.
Not really. There are some errors in composition so basic that not even a beginning sign painter would have made them. Aside from that, though, looks like a fair amount of time was spent on the thing. Cleaning it off is going to be difficult if he used enamel and the bricks are porous.