Copyfraud

Copyfraud is falsely claiming copyright ownership of works in the public domain. […] Mazzone's article describes copyfraud within the context of US copyright law, but he points out that: ‘As a result of the Berne Convention, there are some basic similarities throughout much of the world.[’]

The GPL and GPL FAQ don't say that applying a copyright and license (GPL) to Public Domain works after a trivial modification is copyfraud either, but it is.

Made possible because people trust in the veracity of something that at times is nothing more than a chimera, copyfraud is a particularly acute problem when exacerbated by public institutions like museums.