I've never actually climbed into a Dumpster, mainly because I don't know of any in my area except the one behind the supermarket, which smells absolutely vile. (Also, climbing into something that big is a bit tricky when you're five feet tall.) I have picked up lots of good stuff off the curb, though. The one time my husband and I went poking through the bins at the university where he works, we nearly got arrested. The ironic thing was, we had actually gone there to take something back. Earlier in the week, he had taken five shipping pallets (with the express permission of the folks working there), but when we went to take back the one we didn't need, he decided to have a look in the bins, and while he was doing that, security showed up. The campus cop warned us never to come back there again and then let us go. I don't think we were actually breaking any laws, but I gathered that the college was concerned about its liability. She said something about how "there had been deaths" in that area, presumably from people being injured or trapped in the Dumpsters. So I guess that's another reason businesses might not want to allow it.