And to your concern "As many as 80 people could be dropping trash in my can".
A) Does this ever happen? Are you finding your can full, and are unable to dispose of your household refuse? For me, this would be a reasonable concern. But as I've clearly stated that my can never gets full, and I actively welcome people dropping trash in it, this isn't a problem I've seen. I'd love more elaboration from your perspective.
I appreciate the overall concept of keeping trash off the streets, but to answer your specific question: it's a yes. I have had weeks at the old place where I had to hoard bags of trash in my garage because my bin was filled by passersby dumping things, including masses of dog shit. The worst was when someone dumped a big black bag of half empty beer cans. Of course the bag was not tied off, and was ripped, so half of the beer spilled and stagnated in the bin and I had to actually hire one of those professional cleaning trucks to come by and steam clean the thing.
So it seems that we're not seeing eye to eye because of the vastly different contexts that we view the situation, which I think is fair enough.