That law should be changed. If you distribute your intellectual property with DRM, that work should forever be exempt from copyright protection. You get to choose one or the other, but never both, because DRM effectively removes the work from the public domain in perpetuity.
Even accidentally releasing a demo or preview with DRM should invalidate copyright on that software/movie/book/whatever.
Even accidentally releasing a demo or preview with DRM should invalidate copyright on that software/movie/book/whatever.