"Copyright issues" refers to legal problems related to the unauthorized use or reproduction of someone else's creative work, such as music, books, artwork, or movies, without the permission of the original creator or copyright owner. Full definition
Apparently, that's because of copyright issues with some proprietary drivers that they felt they needed to install. (slaw.ca)
But steer clear of copyright issues; Never use another site's privacy policy (or any content, for that matter) without written permission from the site owner. (realtormag.realtor.org)
I too have thought about copyright issues, but, like you, I can't see that there are any that can get in our way. (slaw.ca)