I can't relate to this at all, I feel like I went the opposite way. I started out putting all of my work out under GPL but slowly realized how restrictive and demanding such a license actually is, I think public domain is the license that provides the most good to the world as a whole. It enriches everyone, even those who I don't necessarily agree with. It is a much more powerful statement in my view to provide work in a way that allows the entire world, (corporations included) to enrich themselves and educate themselves in an open and free manner.

If this means that they are going to repackage and sell the work, that is their prerogative. If that means a professor wants to put the work into their course and help to instruct a class with it, that is great too. It is nice to attempt to force people to play by the rules I like in order to try to enforce the actions that I see as best for the world, like sharing, etc. But at a certain point you just have to realize that there are differing points of view, that is just the way things go, and "progress" includes all of them.