If naughty old boppers thinks that will stop the rampant stupidity aired on DU from getting out into the world at large, he is very sadly mistaken.
On edit: But if they did do that, I'll bet some of the more inflammatory types would really let their hair down and say some truly amazing things, things that would have the Secret Service paying calls on some of the members. Alas, restricting access to the site beyond current strictures would wound or kill $kammer & Co's cash cow, so I doubt that would ever happen.