I ranted because I find it rude that I now have to rush to get ready to go, or in the past have had to rush to stow my purchases all because someone has laid claim to my spot before I've even gotten in the damn car. Would you do that for a table at a restaurant? Perhaps I shouldn't ask, because I once had someone do that exact thing to us once, in the very same manner as this guy waited for the parking spot.
I once had it happen when I was going out to my car simply to place my jacket inside, as it had gotten too warm to wear and too cumbersome to carry while shopping. The guy asked if I was coming or going, as well, and I replied with, "Staying, actually. Sorry." and walked away. He gave me a dirty look and sped off.