I know I will sound my age when I say this but the way I was raised we did these sorts of things out of common decency and caring for our fellow man. I am not disparaging in any way the deeds on this thread: I think they are fabulous.
But like today, man, I was parked in my car in a lot and watched this woman pull up next to me, and as the big cow was getting out of her car she smacked the car next to her, not bothering to check if she dinged it, the as she hefted herself out, a bunch of trash fell out (candy wrappers etc. probably on her lap) and she glanced down and just waddled off leaving it there. It's this kind of mentality that makes me just want to be a hermit. WTF is wrong with people?
I actually had a woman say to me as I held the door open so she could manage a double stroller filled with baby: "Thank you, I'm so used to everyone just sitting there watching me do it myself."
If we all just put others before our own agenda, and kept our own selves/surroundings in check, it would be a lot easier to exist with each other.