I'm out doing road cleanups with our service club on a regular basis. You would be amazed at people's nerve. There are those that have dumped their trash right as they drive by you.
Of course, there are those who stop and thank us. Some have even brought us coffee. Yup, Timmies.
When possible, I will pick up at shore fishing spots as well, but one bag of recyclables doesn't even make a dent in some of the worst places. Like they say, I alone can't clean up the world, but I can look after my own little corner. Just keep it in perspective.