Somebody said it was gangs, but the cops think it's only skateboarders. Well, I count three options. A. We can ignore it. Only often when you ignore a problem like graffit, it proliferates. B. We can criminalize it, which we quickly did this week. Merchants are now offering a $1,000 reward to finger the downtown DaVincis. C. Or we could offer a big blank wall space where graffiti tagging is allowed and encouraged. Think of it as a big urban art contest. The mayor could award monthly blue ribbons to the winners. Maybe they could even perform their art during First Fridays. Got a better idea?