Sarcasm aside, (you may have missed it) I LOVE the balanced argument in Legal vs Moral. Street art may be illegal , but as you point out Charity, is it any less moral than advertising. Ads some times just occupy space that was otherwise unused, as does street art… though on MANY occasions it takes up vast spans of vista that were doing something else…billboards along train platforms where better views could be had.

There is no denying though that some take the forms of street art an apply them in a anti social way…perhaps those with untempered impulse control…much like some drivers…though driving is not banned or immoral

cheers WEK good article