Because the forum has been made public. No candidate in 2012 will bring it up again after this week.
Thats not to say kooks won't continue to be kooks...we all know that won't happen. But too large a percentage of voters were thinking about this, rather than record unemployment, negligible GDP numbers, insanity at the Federal Reserve, unsustainable deficit spending, and Owe-bama grossly misrepresenting himself in 2008 on most of these issues I mention here.