Custom Parking Placards

Simple idea, really, for when you're trying to park somewhere and the only open spots are reserved. I've encountered this problem more times than I can count, having lived on military installations for most of my life. Everywhere I go (commissary, base exchange, post office, MPF, etc.), there are parking spots reserved for Colonels, Generals, Stand-by Personnel, all marked with nothing more sophisticated than a little brown sign, and always in the very best spots.

So what I propose is this: A brown sign of your own that is marked with your own personal title (in my case, I'm a crew chief) which you stick over the existing sign. In addition, you would have a special sticker or placard which is prominently displayed in your vehicle's window which is designed to look official. Cops don't know the difference, all they know is that your placard matches the sign, you're legally parked, and as long as they don't see you put the sign there, you've got no worries.