I agree with the whole etiquette concept. When I ask to scrap whatever metal or aluminum cans out of a dumpster I always call the person by ma'am or sir and say thankyou. Even today as I'm scrapping aluminum cans out of the forest preserve I call the homeless people sleeping on the picnic benches sir. I figure its the right way to be with people and you'll have a better chance of getting what you want if you treat them the way you would want to be treated. As far as picking up garbage in the area, my hands aren't broken and helps me to score points with the people who work for the forest preserve dept because they will put stuff to the side for me since I'm making their job easier.