When I was kid (you know, back in 1960's-1970's???) Indiana had the bottle return policy. In 1965 my parents started parking their travel trailer in a somewhat seasonal campsite, (very primitive, no running water or showers anywhere, and dump stations was not even thought of yet), us boys would scrounge around for every bottle we could fine. As that park often hosted different orginizations annual picnics (like Elks, Moose, American Legion), we'd hang around the activities and grab the beer and soda bottles they throw around.
The owner of the campgorund would later take us into town were we redeemed them. Back then, we thought we were rich! Well, a quarter back then sure spent a lot more than it does these days for sure.
Indiana never had a return "can" policy though. But yea, I can sure see, if you live in a state that has the return can and bottle policy, you'd never see one tossed away.
Around where I live, recycling aluminum cans is a "somewhat" trend, but you got to have something like 500 pounds of cans to get that quarter now a days! So, often the "mess" of the having cans laying around just isn't worth it for some.