Similar thing happened here in my area last year. I remember seeing a bird flying with a six pack rings around its neck when it took off from a roof. So I made a habit of picking up garbage especially plastic. You can also leave signs saying 'do not litter' at your front lawn. And have others in your area do the same. I've noticed living near a public school full of pre-teens doesn't help having a clean lawn in my neighbor. I would always see plastic bags and bottles near my house. And most of the people in my area don't even care. Which is all the more reason to move. A petition would be a good option.