I walked off the course last time out because of two numbskulls I was playing with. I knew that I would never make it through 18 with these guys. 6-8 shots to hit the green, slow pre shot routines, not ready to play, no real knowledge of the game. I told them at one point that it's OK to be a beginner but you still have to be respectful of others. Get to your ball and be ready to hit as soon as you can. That fell on deaf ears.
I think courses should have rules posted and in each cart stating what ready golf is and how they expect it to be it to be applied at this course. Many golfers don't know, know one tells them. You can teach etiquette!