Before you choose to head back to the Classic look of the site, we'd appreciate it if you share your thoughts on the Beta; your feedback is what drives our ongoing development.
Beta is different and we value you taking the time to try it out. Please take a look at the changes we've made in Beta and learn more about it. Thanks for reading, and for making the site better!
It seems to me that the GPL depends on copyright. It is not a public domain thing.
Copyright law gives the copyright owner a certain control over their work, that is, aside from backup and fair use rules, no one may copy that work without permission of the owner of the copyright.
The GPL freely gives people permission to copy the work, under certain restrictions. Those who cannot accept the restrictions don't get permission to copy the work at all, except within copyright law.