I was in an Uber on the Don Valley Parkway today and, for some reason, all of the graffiti on its sound barriers caught my attention in a way that it hasn't before. Maybe it's because I don't travel enough by car or maybe the highway people haven't yet done their spring cleaning. Either way, I caught myself thinking, "Hey, a lot of this looks pretty cool. Here are boring and utilitarian sound barriers that have been covered with colorful things."

Of course, street art is a tricky thing. Because, at the end of the day, it is, as French artist Invader says, illegal. It is an act of vandalism. And so there is a fine line between street art and criminal behaviour. When I leave my home in the morning and I discover that someone has spray painted nonsense on one of its exterior walls, it absolutely pisses me off. How about I come spray paint your home?

But what if it wasn't nonsense? What if Invader had decided to "invade" Toronto and I instead found a pixelated neon green Pac-Man outside of my lobby? It would still be illegal and it would still be vandalism, but I would frankly feel excited that Invader had decided to come and bestow my home with one of his art pieces. I would then proceed to take a picture and send it to all of my family and friends.

Now, obviously it makes a difference when it's a known artist. Context matters. But Invader had to start his illegal pursuits somewhere. And I find it interesting to think about the line where something is able to pass, in our minds, from being an illegal nuisance to a desirable art piece. I experienced moments of that along the Don Valley Parkway today.