well it sucks cuz you have black which is the easiest color to notice dents and dings.
but like said the rsx did not come with door moldings to prevent door dents and dings. you can get them from the dealer but they take away from the aesthetics of the car imo. it is one of those things that you should be wary of where you park and your surroundings. the rsx does not seem to be any less "stronger" then any other honda/acura i have owned or driven, but i have about 3 door dings on my car and i have nbp as well.