[teekert]

It's not and I am glad it isn't. The GPL is sometimes enforced and rightly so, code authors choose this license and donated their time and skill under this condition (the GPL) of their choosing. Re-licensing it or ignoring the licenses is a crime, you lied that you would uphold the license when you started using the software.

Don't get me wrong, I love the GPL, I love free software! Choosing a license though, GPL or proprietary, is entirely up to the author of a piece of code though. Forcing open licenses upon authors is detrimental to freedom in general.

Worrying or not worrying about it has nothing to do with the ethics of breaking the GPL (or any license).