Frogboy has stated that while Stardock is "pissed" over Gamestop releasing Demigod early, there will not be a lawsuit. So I figured that we might as well come up with ideas of what Stardock could do. While Stardock may not use any of the ideas, I think it will be a good form of stress relief. Who knows, Stardock might like one of the ideas.
1.) Overkill response - refuse to sell Gamestop any more games published by Stardock, ever. While this will may make people feel good, I don't see it happening because Gamestop, for all their flaws, is a source of income for Stardock.
2.) Don't sell them any more copies of Demigod then they have already bought. This is a bit overkill, but would be possible. It would be similar to how Frogboy is perfectly willing to tell customers he doesn't want their money, it would just be one step up in scale.
3.) Variation of 2 - don't sell Gamestop any more copies of Demigod for a few weeks.
4.) Don't let Gamestop have copies of a Stardock published game until after or right on the release date. This could be justified by pointing out all the other times Gamestop have broken street dates for other games. It would be a simple "Sorry, you have demonstrated you are not responsible enough to get a game before the official release date/street date"
Persionally, I like 3 and 4 as they would let Gamestop know Stardock does not like their actions while not being absolutes.
Just typing that has made me feel much better.