Stay out of jail

«The police use the internet to catch graffiti writers. Don't be stupid. Never post a photo of yourself along with a photo of an illegal piece of artwork you've done. If you're going to make a profile to show off your work, don't use your home computer and leave no way for it to be tracked back to you. If we're going to keep this culture alive, we need to keep you on the street and not in jail.»

GATS - Graffiti Against The System

http://www.flickr.com/photos/dalaiama