Hmmm, I get the wish to remain anonymous at the present day, but I view this a bit like finger prints. Unless someone is doing something they are not supposed to be doing, this seems like a no big deal issue. I guess I'm on the fence, probably because the government has both my DNA and Prints, most likely my biometrics as well.
That said, it raises an interesting question on the 4th amendment:
The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.
Can you be secure in you person, if the government literally has your "person" on file?
It's worth a discussion IMHO, obviously as members of the military we submitted finger prints and DNA as requirement of service. Thus a warrant is not needed as it was an act of admission of sorts. Does that eliminate our 4th amendment right?
But yet I fall back to the "if you ain't doing anything wrong, you ain't got nothing to worry about" .