MAP pricing is in effect for virtually every product from deodorant to TVs, so I don't see why GM couldn't find a way to at least reward dealers who don't take advantage of the situation. Granted the dealers have the right, and we as buyers, have the right to boycott and spread the bad word.
Darn, this reminds me of the $10k scam John Megel Chev. up in Dawsonville, GA tried to pull on me this past summer!