Sometimes a stiflingly by-the-book teacher can actually inspire creativity, though it's generally in the form of ever more-imaginative penises drawn on her car. For similarly inspired, more elevated graffiti, check out the work of Rene Gagnon.
A veteran of the Massachusetts graffiti scene in the '80s (...it existed!), Gagnon's resolution to spray was only hardened by his graduate Illustration professor's denouncement of the style; he now uses spray paint, silkscreens, and hand-brushed acrylics to create cheeky street-styled masterpieces, 65 of which're showing in Denver (through the weekend) in an exhibition called "Urban Flowers" -- also what Keith deservedly lugs off stage every night. Have you heard "Days Go By"?!? Rene's site's loaded with buyable prints, including truly ghetto fabulous numbers like the fancy-cursive'd "Today Was A Good Day" underneath an AK-47, a sunglasses-wearing fashionista crossing Louis Vuitton-printed .45s across her chest in "Always in Season Blue Steel", and "Pawn Shop Jesus", with the Lord's son dragging his giant cross to a pawn shop, though given the market, you know he's gonna get totally nailed. The best of the rest ranges from the potentially patriotic "American Artillery" with the Stars and Stripes done up as colored Krylon cans, the similarly quasi-nationalistic "Can't Stop Won't Stop" with an American soldier walking on two prosthetic legs, to one with a tee-baller swinging at a banana whose title appears to be "To Hell with Warhol", though given Gagnon's interest in religion, that may just be a request.
Though not yet for sale, he'll soon be posting buyable prints from the Urban Flowers show, all of which'll be personalized with some marking, splatter, or other form of "hand embellishment" -- also something most kids would have no problem applying to a teacher's car, assuming they've already demonstrated the balls.