Comment Re:GPL requires no DRM? (Score 2, Informative) 717
FTFA:
http://www.fsf.org/news/blogs/licensing/more-about-the-app-store-gpl-enforcement
Basically:
Each time you redistribute the Program (or any work based on the Program), the recipient automatically receives a license from the original licensor to copy, distribute or modify the Program subject to these terms and conditions. You may not impose any further restrictions on the recipients' exercise of the rights granted herein.
In short, I think there are problems beyond DRM with GPL software being distributed through the app store.