I feel your pain. We even watched one of our employees back into someone else's car and just continue on. No note, and no message to the victim the next day, so I confronted him the next morning and gave him an oppurtunity to right the wrong.
Dings are near the top of my list of peeves. I will go out of my way to park in the far reaches of the parking lot, even if it means a 5 minute walk in -20 weather. Even my wife has started to see the reasoning of my ways, after our (her) truck got dinged.
And parking beside a nice car is no guarantee that there isn't some self absorbed prick driving it who won't ding your door. Look for one that is very well looked after instead. Or a Ferrari.