I’m with Flora. If he wants to paint a mural, let him do it in his own home, or get someone’s permission to do it. If he’s doing it on other peoples’ (or public) property without their consent, he’s causing damage to, not improving, his “canvas.”
And that’s the ones who actually produce something that looks art-like. People who just leave illegible scrawls which are (I assume) intended to be an “I was here” symbol but mean nothing to the thousands or millions of people who actually see it, the statement applies even more.
Chaim Mattis Keller
“Sherlock Holmes once said that once you have eliminated the
impossible, whatever remains, however improbable, must be
the answer. I, however, do not like to eliminate the impossible.
The impossible often has a kind of integrity to it that the merely improbable lacks.”
– Douglas Adams’s Dirk Gently, Holistic Detective