Sail Magazine Feb 2016 edition (pg 14) has an article on dinghy dock etiquette > it lists leaving your outboard prop down and using a long painter. I have added a few other things:
-- keep your approach speed under 20 mph as you make final contact against the dock
-- no yelling "make a hole" as you approach a crowded dinghy dock (unless you have the biggest dinghy)
-- no throwing up in anyone else's dinghy
-- no tying "granny knots" on the cleat above my painter
-- you must leave in the same dinghy you came in
-- no untying and pushing off to leave until after you have started your engine (keep hearing my famous words, "Oh crap!")

Maybe you can list some more --