Mayor Bloomberg's reaction is interesting - I'm curious to know when a person transitions from vandal to artist. I don't think anyone could argue that Banksy hasn't cemented a place in the 'history of art' and the books our children read that cover this period will feature his work. In the UK a lot of people are genuinely gutted when a Banksy gets removed or covered - like something (a gift?) has been removed from th…
It's not vandalism if the owners of the buildings are happy to have the piece.
If I scrub a brick wall clean, is it vandalism? No.
If I glue a solid pound of gold to a brick wall and the building owner takes it, is it vandalism? No.
If I have a work painted on my property that draws crowds and will probably have a "market value" of a lot of money, and I'd rather have the work have been painted than not exist, is it vandalism? No.
If I'd be happy or even would actively desire to have a Banksy piece painted on my property, is it vandalism when it does happen? No.