I know a lot of individuals that scan documents, manuals, defunct school books and sell them on Ebay. They just scan the document, and state they own the copyright. They don't just claim ownership to the scanned usually PDF; they claim they own the original copyright.
There's a Seller on Ebay who digitized Chicago School of Watchmaking(old trade school closed down in 60's, or 70's?). He's been selling it for years. If he sees competition from other sellers, or free versions online he claims copyright infringement to Ebay, and to "offending" domain owners. Ebay takes down alleged copy written item, and website owners usually cave in too. (It's not easy to verify older copy written material.)
I wonder if it's a crime to state copyright ownership on a piece of work if the original owner of copyright died, and didn't transfer the copyright? Or, the work was never copy-written?