A great truth of the world: Most people will do the right thing, IF YOU MAKE IT EASY FOR THEM.
I don’t just mean people will always do the easy thing, though certainly some will. No, really, most people will do the right thing — put the trash in the can, donate to the noble cause, be kind to their neighbor, etc. — as long as it is not much harder than the wrong thing.
It’s when the right thing starts to really cost us — so many stickers! so many graham crackers! — that the choice becomes difficult.