Is a grafitti considered an art?

people - of detailed , beautiful -

of scribble , tagging -

of done on building offered canvas -

of done on public or private property not wanted or welcome.

if done on property welcome art - , done art not "mark territory" - can considered art

if done destructive - or "mark" area no not feel art.

the definition of art is, has long since been debated many? i'm curious if grafitti can considered art.

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