If you want to do graffitis, why don't you do it on your own walls at home? Not that I don't like it, but not everywhere, and at any cost. Even if it is art, it can be seen as "pollution". True some are beautifully done.

Montreal spent 3.5M$ to clean up graffitis last year. It is illegal to do any but still and fines are hefty if caught but people still do it.

Montréal has decided to invest in the creation of artistic murals, in collaboration with several different partners. 73 murals have been created since 2007 by Montréal artists, under the initiative of the Propreté (cleanliness) division, the service in charge of beautifying the city. Most have been in collaboration with the organization Mu.