Are we certain we understand what this so-called "Creative Commons" is? I'm familiar with copyright and trademark law (as well as international conventions, such as the Berne Convention), but I've never heard of Creative Commons. Nor have I ever heard of a law or other agreement that would permit the holder of a copyright/trademark such as the one in question to sue someone for the kind of non-commercial display that appears to be at issue here.
From what I can gather from the internet, Creative Commons appears to be some sort of vehicle to help artists license their copyrighted material (somewhat like ASCAP or BMI for music). If that is correct, that would make Creative Commons a mere licensing agency. The substantive source of the artist's rights - assuming his or her work would qualify for protection - appears to be applicable copyright law, not Creative Commons.