Pierre's actions are the direct result of his choices, and his actions bring consequences. He draws a face on a wall; he attracts criticism for that. He brought that on himself. If he did this in Philadelphia or Los Angeles, it might be thought to be appropriate; actually, I doubt anyone would care and I think they might find it cute or something. But it seems that it is not appropriate in Milan, or is already a major problem there, so his doing it has brought on criticism, and he has only himself to blame for it.
Pierre wants the paparazzi to back off and respect his privacy. Then he defaces a wall in the city. He is not showing the city much respect; yet he is outraged that he is not respected in turn. Pierre, if you give respect, it will come to you in turn. But you have to give it!!!! On a similar vein, Pierre, if you focus on the paparazzi that is what you will get more of.
Pierre says to that paparazzo, "Don't you have something better to do?"
I say to Pierre, "Don't you have something better to do than address them, give them time of day?
Sorry, but it seems to me that Pierre is being something of an idiot. If Pierre didn't do things that make magazines buy the pics (like skateboarding on sidewalks, drawing graffiti on public property, hanging out with models) the paparazzi would have to spend their time following people more exciting. If he does not want to be a celebrity, he should not behave like one.