Door dings piss me off. For someone to so carelessly swing their door open into someone elses car without thinking twice and walking away is inexscusable. I have seen this happen many times in parking lots starting as a young child, walking to and from the car with my mother; up to now, seeing the evidence on my own car. I have always thought these actions to be utterly careless and asinine and can honestly say that i have never inflicted a door ding on someone elses car, no matter the tightness of the lot.
If, while walking toward my car, i ever see someone "ding" my car, i will either confront them and demand payment for damages up front or quietly let the air out of their tires after they leave (depending on the size of the offender).
The worst part about door dings is the feleing of helplessness that comes with them. The only thing i can do is park in an end space to limit possible damage to one side and hope for the best. I would rather run into a curb or something than be "dinged" because it would be something i did myself that i could have prevented be being more careful. Dents cannot be removed either, unless the whole door is replaced, which would be silly for a little dent or two and would not stop the problem in any case.