lol. need to chill. matt is right, zr1 and nault31 make a good point, but you have to remember, you can take all the steps to be a safe driver, and still some douchebags behind aren't paying attention, this is just another thing to help. my OPINION on it tho is that it is annoying as hell, and everytime i see it on a car i get irritated and it makes me think the driver is just some IDIOT, but then again, I think just about every driver is an idiot.