What is it about "private property rights" that spunkie doesn't understand? I'm done trying to 'splain it to him.
So does the military on vehicles that have base stickers. If your vehicle has a bumper sticker that they believe is objectionable or offensive, or that could be deemed such by the general public, you have two choices: remove the bumper sticker or remove the base sticker (and you will not be allowed to drive onto any military installation).
Of course on a military base a political sticker wouldn't be included in that, but you don't find many Kerry stickers on base anyway.