Graffiti and, more broadly, street art was once considered more of a nuisance than an art form. While the circumstances of its creation may be legally ambiguous, street art has undoubted creative and monetary value.
Harboring Graffiti under the Copyright Law
Social Media Influencers Beware – Street Art Is Protected by Copyright
Street Art: At the Crossroads of Creative Rights and Consumerism, GWIPEL
Street Art, Copyright Infringement, and De Minimis Use
When IP meets counterculture: Is graffiti protected by copyright?
Harboring Graffiti under the Copyright Law
Banksy trademark not filed in bad faith
When IP meets counterculture: Is graffiti protected by copyright? - Lexology
When IP meets counterculture: Is graffiti protected by copyright?
WILD STYLE1 Fashion, graffiti flavor - Santarelli
Graffiti: The Complicated History Of Counterculture – Curiosity Shots
Protecting Artistic Vandalism: Graffiti and Copyright Law - NYU Journal of Intellectual Property & Entertainment Law