Having a government approved spam filter would be better than letting an oligopoly of five companies decide what constitutes spam. In fact, I can't think of a

Having a government approved spam filter would be better than letting an oligopoly of five companies decide what constitutes spam. In fact, I can't think of a single market dominated by a handful of large companies hasnt been improved by the introduction of a government competitor. There's a reason telcos lobby hard against community broadband and that financial institutions dial back the usuriousness of their fees when the post office offers bare bones accounts.