Just for the sake of a coffee corner talk: What would you say today about that picture if that had been painted two thousand years ago? I bet that it would be a tourist attraction and scientist would tell us about the high standards of art of bygone cultures.
Don't get me wrong, I'm not defending that vandalism but the world isn't easy. It's a very nature of art that it doesn't please anybody. It's somewhat funny to see how we adore ancient carvings and demonize graffiti at the same time. I don't like that at all but I'm an old fart and I believe that I don't have the right to judge the art of the youth reckless.
Harald