The first time I ever encounter this in my life was at the Mall of America in Bloomington MN back sometime around 2004 or 2005. My wife and I went to the mall and found a car just about the back out from a spot, so we stop and signal claiming that spot as ours once the person leaves. Then all of a sudden a car came and stop on the opposite side facing us with no signal on and then a middle eastern guy got out from the passenger side and make his way to the spot we were claiming as ours. So as the parked car pulled away from the spot the middle eastern guy walk and stand right on the spot claiming he got the spot. My wife was furious and start cussing and complaining loudly to me and I said, its not worth getting shot over a parking spot and I drove off.
Since that incident, I've encounter two more of the same incident in my time around the Twin Cities of the same color middle eastern people. I think this kind of things started with people of Middle East origin, because in their country, its normal to do this, they brought the practice over to the US and all the idiots of all colors catches on uses and abuse it.