Healthcare.gov, the federal website where you sign up for Obamacare, is quietly sharing your personal information with private companies. The evidence is in the computer code on the website itself. It shows that Healthcare.gov is relaying certain information, such as your zip code, income level, pregnancy status and whether or not you smoke. That information is being shared with several third parties. DoubleClick is a Google (GOOG) subsidiary that serves up advertisements and tracks your movements online. Healthcare.gov also shares your data with Google, Twitter (TWTR, Tech30), Yahoo (YHOO, Tech30), YouTube and others. "People's private medical data should not be...