Vandalism is willful or ignorant destruction of artistic...
Graffiti is art
Vandalism is willful or ignorant destruction of artistic or literary treasures. (http://dictionary.reference.com...) So. you are destroying art, not creating art. Additionally by saying amazing you Are expressing your opinion and you are actually fueling this argument from your heart not brain. www.spontaneouspainting.com is a commercial website and pinterest is a social website. Art is, by your learner dictionary website definition, supposed to beautiful or be an idea, but you instead mess up the preexistent facade you use and block preexistent ideas.