Technically it is theft. Theoretically, no one cares. But if someone does and calls the Police you can get a ticket (depending on your town's laws). Now, if you are DUMPING you get a Theft of Services ticket.
I learned this the other day.
No. I didn't get ticketed but a co-worker read in the paper that someone did.
Personally, my diving hunting has slowed down. I took a good look at all the stuff I have accumulated and realized why people throw it out! So I am focusing on fixing things up and selling or donating things off. I just got WIFI at home so ebay, craigslist here I come!
Here is a photo from a fellow Treasure Diver. All items were found in or next to a dumpster. This lucky college student is now fully prepared to study hard! What a lovely desk and they were going to throw it out!