I'm one of those that cries after every little scratch or dent. It drives me nuts when people are careless. The worst door ding ever happened in my own garage. My wife opened up the door of her Lexus right into my then Nissan Pathfinder. Dings in both doors... After that, I just gave up on any potential education I might be able to provide for my family reguarding car door etiquet.
I have never thought twice about how much the tailgate would hold. I'm sure more than I would ever place on it.
Rob