A friend of mine used to be a rather... prolific graffiti artist and he once explained to me how, once he's up on a scaffold somewhere, he can basically do what

A friend of mine used to be a rather... prolific graffiti artist and he once explained to me how, once he's up on a scaffold somewhere, he can basically do whatever he wants because nobody bothers to look up. So I'd say it's true in real life too.