I'd use my "especially writing" heuristic here to separate the two – graffiti comes from the Greek root "graph" (to write), right? So even though 1 contains ela

I'd use my "especially writing" heuristic here to separate the two – graffiti comes from the Greek root "graph" (to write), right? So even though 1 contains elaborate and beautiful full wall pieces, I would still consider them "graffiti," especially because they seem spontaneous productions by citizens (taking back the architecture of the city into their own hands!) and not commissioned by an agency. The involvement of the ad agency (i.e., an institution of some sort) and lack of writing would make 2 certainly not graffiti, despite the subversion of the law. We could call it vandalism, actually. Beautiful vandalism in the form of a wall mural! The trickiest to define is something like the Berlin wall – if I'm not mistaken, the city gave permission for anyone to come draw/tag to their hearts' content all along portions of a wall. Does permission make it not graffiti? Some would say yes. Personally, I disagree – if it is writing rather than drawings, I still consider it graffiti, minus any perjorative associations of the word. Grafitti is an art form too.