Littering

I notice teenagers around my office constantly throwing food and garbage on the street without a second thought. Sometimes it seems like they are proving themselves grown-up, like when they smoke. Although it bothers, less so then when I see an adult behave in the same manner. I was in Barbados and saw, from a distance, a man with his girlfriend---visitors, not native--- waiting for a taxi. He pulled out a pack of cigarettes and proceed to throw the cellophane on the floor than the foil inside the pack, followed by the match. Neither one could careless about polluting this beautifully clean island. What gives?