Really recommend watching the documentary PIXO, you can find the full doc in YouTube with english subtitles.
[edit: suggesting the documentary]
It is most certainly not. This romanticizing of criminals and vandals is not any kind of compassion. Who would like their neighborhood or home turned into a hell scape?
Would you like to look at only buildings and every surface around you looking like the picture above and worse for hours every day for your commute. Because that is the reality for millions of people. Desolation and decay might be a cool photo for traveling hackers to put on their Instagram, but I think it is different when you have to live in it.
I have never heard anybody from São Paulo talk about the delights of this grafitti covering the whole city. I guess they're just uncultured?
The only gang graffiti you’ll see in São Paulo are written in plain letters or numbers (“PCC” or 1533), nothing like Pixo.