Is Graffiti Art Or Vandalism?

Love or hate it graffiti is part of the everyday urban world. It's a fact that Banksy and other well known street artists, who are now household names, have busted the whole urban art scene wide open, brought it forefront into the public's attention and it seems the room to sit on the fence with an opinion as to whether it is an art-form or vandalism just got a whole lot narrower.