It won't do to plead 'I didn't know' when you are no longer one of 300,000,000 sovereigns but rather a tax serf living under obama's and the democrap party's federal oligarchy. If you fial to exercise your responsibility as a member of the sovereign 'We The People' you become part of the problem, like an obstacle in the way of cleaning the federal gutter.
Your “ignorance” link didn’t work.