Plus, the terrorist algorithm could be adapted to fight crime in other ways too! Like predicting if someone is a likely speeder, or if they thing "strange" thoughts, or if they're an enemy of the administration.
Anyhoo, once computer code is created it never goes away. It's not like breaking a mold.
A good example, Governors can sign laws that say the police/government can't keep databses of gun-owners, like Jeb Bush in this thread on FR, but that doesn't mean it won't happen in another form (such as magazine subscription lists, credit card statements, club memberships, etc.). After all, if guns are used to commit crimes, shouldn't the government know where they are all at.
Funny you mention about the databases predicting if somebody is an enemy of the administration. If we get any more PATRIOT laws passed, pretty soon the government can officially monitor various groups on the internet to see what their intentions are. I'm sure the liberals would consider FReepers/Conservatives to be enemies of an administration (and armed ones at that).
A gut feeling said that when they killed TIA, etc., that they weren't really killing it. It's like a Hydra, cut one head off, two more pop up.
The sad thing is, if there was another terrorist attack on US soil (although actually the usage of the word "terrorist" is being expanded in scope), all the people who rely on the government to take care of them would really start making a lot more noise, and would have no problem giving up what little privacy we have left, and would probably give up quite a bit of freedom, just to have the government's blanket of protection wrapped around them (How's that for a run-on sentence, lol). A typtical liberal reaction is to run to the government, and with apparently half the country leaning that way, things could get ugly, especially for Conservatives.