I love this ad. I love it for two reasons.
1. It doesn't thrust a POS or message down your throat and doesn't try to manipulate you into buying something.
2. It's interactive, engaging and a damn sight more interesting that most adverts these days.
This is a piece of technology called an "e-cast billboard". The advert is for Sharpie, everyones favorite permanent marker. The ad catches the general publics desire to deface public property, and made it into something positive. These interactive billboards have been put around a bunch of cities and allow people to experience the rush of creating their own little piece of graffiti art. They can choose colours and write any message they want on the cast. Whether it be a doodle, a signature or a profanity, the beauty of it is...it doesn't matter.