Nope, wrong. The U.S. Government has the power to decide whether or not you can leave the country. If you attempt to leave the country after they decide to specifically bar you from leaving by denying your passport application or denying you at the border, you could be arrested or shot at the border.
The USA doesn't let its' livestock go cheaply... Expatriation fees are rarely less than 10% of your total worth, and you still get taxed on all income earned for the next 10 years!
...And if you don't expatriate properly, you will be taxed by the US for the rest of your life, yes, even on income from other nations that they have no business knowing about. People who try to ignore uncle sam because they've lived overseas their whole lives find this out the hard way in the end. Let's just say extradition treaties exist for a reason other than whistleblowers.
But hey, you're more free than anywhere else in Murika, right? Why not stay home... Obomba will take great care of you.