SCGA has a "Pace of Play Pledge." Our course sends notices to the GPS screens if people are off pace, but that's actually annoying. Why? Because it gets sent to everyone on course. We got it yesterday and our group was riding up on the knuckleheads in front of us all day long.
And I agree with Scott. The guys that are slow don't think they're slow.... BUt they are the ones playing from the wrong tees, looking for lost balls incessantly, and generally playing out every putt like it's the million dollar match.