It drives me absolutely NUTS when adults send their children to ask for help (usually the same children who have been running around wrecking everything). Seriously, you’re a grownup, act like it. Besides, I don’t let my kids out of my sight when we’re in public.
The one exception I’ll give is the Chinese family that brings their 10 year old with them. He speaks far better English than his parents or grandparents, and he’s nicer to deal with, too!