ALONG WITH MY PROPOSAL TO REPEAL THE HOLLYWOOD TAX CUTS and various other ideas on how the GOP can push popular ideas that will hurt Democratic constituencies, several readers have suggested that the Republicans in Congress push cable-unbundling as a cause. It will, they suggest, make consumers happy, hurt the entertainment industries and probably put MSNBC out of business since, well, how many people would actually pay to get MSNBC? . . . .