Reply #35: Unlikely. I guess it is a matter for the courts but pesonally I don't think so.

[Statistical]

One can't submit a document to the government and then claim an expectation of privacy from that very same government.

Police routinely use other datasets to determine locations of wanted persons (tax returns, dmv records, phone books, unemployment insurance, etc).

Another example if NICS firearm checks. When you purchase a firearm a background check (including outstanding warrants) is run. If you fail (even due to a technical problem) the account is flagged. Local Police will certainly investigate. You may find it hard to believe but Police do find and arrest wanted felons trying to buy a gun which requires a background check. Not many but they do catch some.

Still it would be an interesting case although I doubt those suing would prevail.