1342
Before / after graffiti
(lemmy.sdf.org)
General rules:
Exceptions may be made at the discretion of the mods.
The clueless case is invalid because it's strictly a descriptive/self-apparent exercise – lest every single act become art, thus depriving art of meaning. I don't have an authoritative answer to your second question, but I'd argue you've created an ephemeral, individual piece of art.