Thoughts
Creative Commons: This is our most permissive license, CC0. It can be used to completely waive all copyright and allow people to do whatever
they want with your project.
Software developer: I don't want to enforce my copyright of this code, and I want people to be able to do whatever they want with it. I'm going to license this piece of code using the CC0 license.
Debian project: We can't use your code :) It's not permissively licensed enough :)
Software developer: What.
Debian project: CC0 is a copyright waiver but it includes a clause saying that it isn't a license to use any patented technologies that you might have included in the code.
Software developer: But I don't have any patents on the code.
Debian project: But you could.
Software developer: If I wanted to make money off of my code I wouldn't have licensed it under the most permissive creative commons license possible.
Debian project: Our lawyers tells us that to protect the Debian project from liability we have to assume that you are lying. You could actually have a patent on the technology and be trying to trick us in order to sue us for violating your patent.
Software developer: Has anyone ever done that?
Debian project: No.
Software developer: I just want to give this code away for free and allow people to do whatever they want with it.
Debian project: If you want your code to be considered for inclusion in Debian please re-license under one of the approved licenses.