Laser Graffiti

Laser graffiti - 'nuff said - incredible idea - nowhere is safe from impromptu messaging - but what more could it be used for? Hook it up in the Middle East perhaps and let Israeli & Palestinian civilians fight a war of lazer-words to reveal their true feelings? Paint some amsuing pictures of a Tony-Jug on the Houses of Parliament in London? Festivals and concerts could use the same technology for something I'm sure? Help locate lost kids in huge crowds by writing a name on the nearest skyscraper? I don't know... please post any better ideas - I'm tired but inspired: