To be fair, with nearly every license you have to do something. GPL just has you do extra things. Almost every license requires you to include the Copyright no

To be fair, with nearly every license you have to do something. GPL just has you do extra things. Almost every license requires you to include the Copyright notice and copy of the license along with your code and usually in the running program as well. Of course, that's a ton easier than being required to release your source code and not DRM the binaries.