Don’t have time to tag your own walls? Outsource it!
Send a Message is an interesting site that allows you to dictate a message to be spray-painted on the Palestinian wall. Full employment for Palestinian graffiti artists. Besides, remember back when the Berlin Wall came down and Bloomingdale’s was selling chunks? Maybe in a few hundred years, when they knock down this one, it some part of your message can sit in someone’s living room.
Regardless of which side of the wall you sit on, it is hard not to appreciate this as an interesting way to call global attention to an issue on a person-to-person basis.