I disagree. A lot of people do not care about public facilities. They do not believe in leaving things better than they found them. You've seen these people around, you know who they are. These are the same people that don't rerack weights at the gym or don't put the cart back at the supermarket. That attitude has nothing to do with income, housing, race, or activity they are interested in. It's simply a result of narcissism. The only way is stopping excuses and enforcing the public etiquette. The world will be much better off.