Seems kind of pointless don't you think?

But I guess it could come in handy for reserve parking or something.

http://www.rksport.com/rkstore/assets/product_images/rks-gc2062.jpg

most likely for in someones garage or on the wall of a room, not exaclty for actual use. Its not like the cops are going to take the sign into considerated and start writing tickets to civic, mustangs etc. that park infront of that sign

Yeah I might get one and use at my parking space at my house. That is if I only have $25 burning a hole in my pocket as well.