Around here, the dump is set up so that once you dump your stuff, it slides down a concrete 'slide'. You basically drive through the scales and get weighed, then depending on what's in your truck your directed where to put certain items. Metal gets dumped in one place, household waste and garbage in another, and hazardous items in another. The place is basically a huge clover leafed layout, with a concrete lined pit in each circle. Once you toss things from your truck, they're completely out of reach as they're thrown down into a pit from a paved roadway. They have huge signs up all over stating that "Removing items from the dump constitutes theft", and "Items left at the dump immediately becomes the property of the county". They have similar signs up all over town about trash picking. "Once an item is at the curb its the property of the City".
Metal items taken to the dump are picked up minutes after you dump them with a huge wheeled loader with a grapple bucket. They toss everything into a huge shredder and turn it onto bite sized chunks almost immediately. The dump serves the whole county and several neighboring areas as well so you can't even go elsewhere to look for stuff.
Our trash collection now requires the use of a huge wheeled dumpster, it holds 90 gallons. They will not take large items, anything you throw away must fit in the dumpster and they scan every load as the truck dumps it into the hopper. You can't throw away building materials, metal, tangle items, plastic, or glass. If the scanner detects any banned items the truck regurgitates the contents back into your can and generates a warning about the trash rules.