Yesterday my buddy and I went out around 4:30pm to get in a quick 18. Unfortunately, there was a high school team out practicing on the front 9 so pace of play was a little slow. We managed to jump ahead of a group or 2, but we weren't stressing it too much because we knew it would open up on the back 9. Anyway, we standing on the 9th tee box, my buddy just teed off and I was setting up when a group of 3 (two older ladies and another guy) drove past us (the cart path goes right in front of the tee box). I had originally seen this group waiting on 2 when we were on 6. I watched them go all the way to the 10th were a group of 2 was just teeing off. Long story short, they just got off the 10th tee box as we were driving up. All three of them proceed to dribble 50 yards shots on every hole log jamming the back 9 and not letting us play through. It looked like they ended up quitting after 15 but the damage was done as it was almost completely dark when we played the 18th. We even told a passing ranger on 12, but he just went on his way back to hose down the carts at the clubhouse.
If you are going to skip ahead of groups, make sure you keep the pace. If you can't handle waiting around to hit make sure you aren't making others wait when you do skip.