About parking lots and rights to one.
Personally, I think if you're there first, and waiting for one
nearest you ( in front of your car ) you have the right to claim.
Anyone leaves a lot behind you, and someone else spots it first and
occupies it, you have no rights.
To me, getting a parking lot requires targetting. Look for
potential lots, cars or drivers walking to their cars, and go wait
there. Or, spot one far away and go for it quickly. Turn on hazard
lights and stop in front of the empty lot till cars behind you
passes by. Don't drive foward too much and allow the one behind to
simply slide into it! Block it first, than reverse into it.
Always works. Better still if you go further away from entrances
into shopping centers in basement carparks, no one likes to walk so
plenty of lots to park there.