Unintentional art ( or the found imagery of postering and “de-postering”)
It’s not real art, it’s just found imagery on fences and hydro poles that has elements of visual interest in it. The intention was first to inform via posters: announce a date and event, push a productor service, etc. Then there’s the struggle for the advertising real estate. Someone posts over an existing one, or tries to remove it and only succeeds in tearing it half off. And of course mother nature has a go at it too.
The result, unintentional crowdsourced art. Although calling it “art” may be a push. At the very least it’s visually interesting. (yes, I cheated a bit by improving the contrast via photoshop, but the elements are as-found.)