Don't get me wrong, but I detest bumperstickers with a passion. To me it's a form of preaching, and most of them are terrible one-liners, jokes etc.
Also, the stickers reveal a lot about the character behind the wheel, and it's normally not good.
Lets not forget that making them easier to put on, makes them easier to take off.
Thus creating a new hype. 'Thieving Bumpersticker Collectors'.
For crying out loud!