I've seen a lot of graffiti and urban street art around the globe but the scene of Buenos Aires turns out to be the funniest and happiest of all. If you walk with open eyes through the city you will find a lot of these colorful art works. Whatever you may think about graffiti, the reputation of those urban paintings is pretty bad and they are polarizing people. What do you think? Is graffiti art or just an urban scourge?