The Hyundai Genesis is the new most expensive domestic car/status symbol in Korea, meaning that, short of buying a Mercedes or BMW, effectually saying, "I'm so successful, I don't even CARE that I'm not supporting my country's economy anymore!", the Genesis is the biggest
freudian compensation kit status symbol you can drive around Korea.
The sign says, according to Girlfriendoseyo, "Don't park here. If you park here again, we'll let the air out of your tires."
Not only is he parking where he shouldn't, but he's done it often enough to be threatened.
I'm told by students who work in the service industry that the most obnoxious customers aren't the really rich, but the upper-middle class people -- the ones who go into debt to buy the mercedes, because their neighbours have one. The ones knocking on the door, but not quite in the club yet. There's an old Korean saying that translates, "An empty can makes the most noise," which might apply.