If you're in America, that would (arguably) be a violation of your constitutional rights. Basically, the gov't isn't supposed to bother you until you committed a crime (until they have reasonable suspicion & a warrant or are in hot pursuit). The same thing bothers me about databases, surveillance, biometrics, TSA, stop-and-frisk: the government has no business treating me like a criminal, collecting my information, etc. until they've got a warrant.