[SantaClaus]

I agree completely with tee it forward.

Much of it is common sense (or a lack thereof in my opinion). Once you get to double par, pick up your ball and stop slowing down your group/those behind you. People are simply not cognizant of those around them. If there is a faster group behind you and you don't want to speed up, allow them to play through. When my wife or son play with me, I keep an eye forward/behind us to ensure that we are not slowing down anyone else that is on the course.