Is This Really a Good Idea?

I found this over on Engadget, it seems some artists in Berlin have been cobbling together a Mac Mini with a projector and a battery. They are then taking this contraption and sticking it onto the side of subway cars with a suction cup. What happens is that the Mini + Projector then projects images onto the walls of the subway tunnels as the train rumbles through...

This is really one of those things that on the surface seems kinda cool... A few eccentric artists trying to brighten up what might normally be a dreary commute...

And then you really think about it...

Some whacko sticking a strange box with wires on the side of a subway train... In this post Madrid & London bombing, post September 11th world, if you saw something like this happen are you going to be thinking "ooohhh cool?" Or are you going to be thinking "Holy Crap RUN!!!!!"