I found this mural today on a bit of public property. This particular spot has been hit a few times before, and each time, the RTA has painted over it fairly quickly. I went past here last week and the wall was clean, so it's quite new. Hopefully, the RTA will have the painters round soon to clean it up.
The RTA could try a bit of lateral thinking and put up a mural here. It's a nice spot, and a mural would do wonders to improve a slab of boring, grey concrete. Something to think about.