Ownership, property, and autonomy are important dimensions in policies that affect privacy, and the concern many people feel comes out of the tension between an individual's interest in restricting what structured data is created regarding themselves and US Customs and Border Patrol interest in generating such structured data.

The Fourth Amendment does not restrict the generation of such structured data which, to my mind, is evidence that a Constitutional Amendment to protect US citizens from governmental surveillance should be written and ratified.

EDIT: add missing direct object at end of 1st paragraph.