Little Triangle Guys

You may recall me seeing some frowning triangles spray-painted on to a couple abandoned sites, such as here or here. If you haven't seen them, this is what they usually look like:

While it's likely that some of these (such as the last one pictured) are imitators, Cleopatra has found the main man who does them, street artist mister.diablo. I highly recommend checking out his stuff.

Anyway, that clears up the mystery about who paints these and why there are so many around.