Very nice indeed, you could probably sell them. I tell my wife that I am going to keep large "prompt" cards our trucks that say things like, "Move Over" "Please Drive the Speed Limit" "Don't do your personal care while driving" and some other good advise.
As for the hate of minivans (Keep in mind that I don't own one), the Great Rod Millen (World Class Driver) has a Toyota minivan with a supercharge as a POV. He says that it handles better than most people think and cops don't belive that they go fast enough for tickets.
I always wanted to get a reader board to hang in the window so I can explain exactly how freakin stupid I think they are.