Expensive cars are definitely more difficult to park. Finding a parking space is tougher because the owner will actually need to locate two adjacent spots. This allows him to park diagonally in the belief that he's avoiding dents from the opening doors of cars beside him. Also, he needs to be at the highest elevation in the lot so the inevitable runaway shopping carts will be rolling away from his car, rather than towards it.
Before he leaves his car he may very well lock a brightly colored bar across the steering wheel, which makes steering the car virtually impossible. Chances are some people will notice the device later on, and speculate that this is the reason that the driver needed two spaces to park. Obviously this anti-theft bar doesn't help if the car thief has a tow truck.
The driver then locks the car and activates his car alarm, causing that annoying noise familiar to every owner of both a long tailed dog and a rocking chair. Everyone else within earshot either has no interest in the car or now wonders just how expensive the stereo is, since the owner spent hundreds of dollars on an alarm system to protect it. Some people may now be considering breaking into the car because of the alarm.
It's also possible that people would notice the car simply because of the volume that its stereo puts out. Many drivers feel that they should be able to proceed at a red light if the way is clear, and the car beside them has a bass cannon.
Some drivers have the type of auto stereo that pulls out with a handle, so it's not vulnerable to being stolen from the car if the driver's carrying it. Unfortunately this means it is vulnerable to purse-snatchers. And if the owner forgets to take it out of the car, it's even easier to steal than normal units because there are no wires that have to be cut.
Another feature that owners of expensive cars seem to favor is tinted glass. Supposedly, if the glass was dark enough, thieves couldn't see if there was anything in the car worth stealing. The driver needs to see out though. How would a police officer pull over a driver who couldn't see the cruiser? He'd probably have to reach him by cell phone… Or maybe his car fax. A few years ago, many drivers of pricey cars had phones installed in them, and carried cell phones too. The cells came in handy in case someone tried to call them when they were walking in their driveway between their car and house.
So as the expensive car owner strides confidently towards the mall entrance; phone in pocket, he is actually enjoying a false sense of security. After all the precautions against other drivers, runaway shopping carts, car stereo thieves and criminals who would steal the car itself, there's one hazard he hasn't thought of, and it's out of his control... His expensive paint job is at the mercy of birds.