Who got the password to Tony Stark's account, and what have you done with the real one?
Are you familiar with National Security Letters? They've been used in the past to force companies to turn over records to the US Government, and the letters specifically state that the companies are not allowed to inform the people whose records have been given out about the release. When the government goes around the courts to force companies to release information, the courts can't do very much about it.
Fortunately, after a bit of an outcry there have been steps put in place to allow companies to appeal National Security Letters. But those protections could disappear again.
You're also making the assumption that the government will uphold the constitution. The current pack of politicians running the country don't seem to be overly concerned about it. One or two major events (terrorist attack, North Korea going "ballistic") and the public suddenly supports doing whatever it takes to get at the "bad guys." Surely you remember the abuses of power that happened after the 9/11 attacks.