We don't see a lot of really tight firm lies in the MidAtlantic area, but I do see them when I get to the Pinehurst area, and even firmer and tighter lies when I've been to Scotland. If its truly firm and tight, putter is a good first choice whenever its a possibility. It takes a little practice to learn the speed, but you eliminate most of the danger of a bad strike. Second choice would be a low-lofted chip and run, and I think the putt/chip technique is a good one for that. I'd only hit it higher if I really need to, and again the pitching technique that uses bounce to glide the clubhead is a really good one to avoid digging the leading edge in behind the ball.
This is the definitely the most frustrating in my own game. Slow play would take it if it was golf on the whole. I have decided to start using game golf again and was looking at my results from last year. Unfortunately I don't think my current results are much much better. Check out the percentages left and right.
For the junior tournaments where I worked as a rules official, the parents were not allowed near the players or their balls. They had the status of being observers or fans, nothing more. No coaching was allowed, and certainly they did not race ahead to the area where the balls lay after a stroke. In fact the only carts allowed for family were for those who were disabled - all others walked. Such potential interaction as you describe would not have been allowed.