Wouldn't the software only accept a chain that builds on the correct early blocks? And woudn't those early blocks secure the premine to an account whose key was only known to the original developers? Are premines really this badly implemented in all the alt coins that have them?! These are utterly obvious precautions. It seems like this would only be possible if the premine was implemented with mind-boggling ineptitude.
Ding Ding Ding...correct. But have no fear, they will point their fingers every direction they can (already calling it theft when it was fairly mined) instead of pulling the thumb.