What has been happening in recent years is a good example of mission creep. The Federal government is involved in a program supposedly designed to trace everything about everyone. Most of this activity is contracted out to Choicepoint who in turn sub contracts parts of the program out to other companies.
Originally part of credit bureau Equifax, ChoicePoint became a separate publicly traded company in 1997. In the beginning ChoicePoint sold personal data and data software to the insurance industry, but it now also sells information to employers, marketers, the federal government and local and state law enforcement agencies.
http://newsinitiative.org/story/2007/02/08/choicepoint_still_on_the_road
This would be Ok if it was guaranteed and proven to work. They claim to be able to find the proverbial needle in a haystack. The way I see it they are just making the haystack so big it will become useless.
Law enforcemt agencies typically
buy your information from private comapnies. The data bases purchased from companies such as Entersect and Choice Point contain a lot of incorrect information.
The purchased data comes with the caveat that the information is not verified and confirmed to be true and accurate. Police departments don't bother to verify anything, at least in my area.
I had a friend who is a detective for my local Sheriffs Department run my local police record. They missed one traffic citation from a few years back and had my ex daughter in law listed as my current wife.
The odd thing is that there is no way to get incorrect information removed.
BTW they also have your browsing habits. If anyone has been to a right wing, left wing, pro war, anti war, or even an adult entertainment web site. They have that information in a computer at your local police station.