Scribbles? Art? Junk? I don't care what you call it but I certainly noticed the graffiti behind the Junction buildings when I first moved to Toronto.
As the subway worms its way out of its dark hole-- between Dundas West station and Keele station-- you can see the backs of the buildings that line Bloor Street, which would normally be a bland testimony to...Toronto-ness.
But NO! COLOUR ABOUNDS! Graffiti all the way...GOOD graffiti, enjoyable to all (because I watch you all looking at it on the subway, it grabs your eye, don't deny it you there mister-man-with-the-briefcase).
It's cool too because it changes all the time, and on your next ride on the train it'll be something slightly different.
Whether you believe it to be art or not, it's something to be seen.
(Disclaimer: I am not promoting going down back alleyways by yourself....unless you're into that sort of thing. But maybe bring a buddy if you're going to check it out off the rails. I've added many many pictures for those who want a peek.)