I would think that if its at the curb, then no, its not illegal but if its on your property then yes. We have some people that go around the neighborhood and collect stuff to recycle like steel or metal. We tossed out an old sink with the faucet still attached. They took the metal parts and left the sink. My husband just put this heavy chair outside and it was gone the next day because someone came and picked it up. It had a lot of steel in it. They even took an old ironing board. I take our papers up to the school recycle bins.