just a word on this...
firefighters and emergency workers use those stickers to determine whether the car has an airbag or not during emergencies, especially when attempting to remove someone from a wreck. We've all seen the video's of how much force there is when an airbag deploys-the last thing a firefighter needs is an airbag going off when they are trying to save someone.
Yes, I know that if someone has to be pulled from a car, chances are that the airbags have gone off, but that is not always the case.
Remove them if you wish, but remember that no matter how ugly they are, keeping them there may help you, your loved ones, or the person trying to save you.