Reply #132: Of course they can and routinely do.

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You have no expectation of privacy from the government when you willingly give information to the government.

Period.

I am no felon but when I purchase a gun not only does the federal government match my information against database of felons but it also shares that information w/ state agencies to match for possible outstanding warrants that are not in the NICS system. The State Police are notified is the system gets a hit. A person with outstanding warrant attempting to purchase firearm. The system isn't used ONLY to prevent felons from getting firearms but also used to arrest those persons without outstanding warrants.

Another example is states routinely share warrant information. Thus if I have a warrant in TX but get pulled over in vA for expired tags I have no expecation that my VA information (license #, address, name, etc) won't be matched against TX list of wanted felons.

Please cite a single case anywhere in history of United States where it was found that a person has an expectation of privacy when willingly giving information to the government.