Our car has a handicapped parking sticker right now. Some friends say that a handicapped parking sticker is merely the entrance fee to a parking game: whether my wife's in the car or not, how good a parking space can I get?
Frankly, I'm slightly more ethical than that. Really! When I enter a parking lot without my wife, I think hard about whether to preempt a handicapped space. Here's the truly moral and ethical issue: Suppose there are hardly any regular spaces left, but plenty of handicapped ones? Then the kindly thing to do is to grab one of those handicapped spaces, to make it a bit easier for "normal" people - some of whom have trouble walking, by the way - to get better regular spaces. Okay? I hope you understand now.