> If you're down Proudhon's "all property is theft" then graffiti is a kind of tragedy of the commons. Go ahead. Graffiti the Uffitzi, Nelson's column, the Plaka. Stick it to the man!

I honestly don't get what are you on about here. I never seen anyone interpret graffiti as some kind of political statement, unless it is swastika or some such. I genuinely doubt any teenager doing graffiti has any kind of idea about any of those names.