Bruce, can we move up there with you. around here it is not "dumpster diving" it’s called "recycling"
Some towns even have fines if you get caught (in Gillette, WY it’s a $500 fine if you are caught, and THEY throw out TONS of neat stuff)
In SD though, it is polite to ask when you see that 20 gal aquarium sitting out on the curb if the people that live there are ok with you taking said item.
The town I grew up in, in NJ my cousins, and older sisters would take me out on trash day “treasure hunting”
Never thought it was bad, until I lived in WY for a year.