There is an understanding between shopper and shop owner about what is happening on said property. The shopper normally does not expect that the shop owner would instantly know your entire biography + family lineage just by stepping onto the property.

Yes, you do have a right to expectation of privacy. A verbal contract is still required for filming you. Open ended contracts aren't valid as well.

We don't live in ancapistan.

sure - posted plainly to the public. "caveat emptor" While we are at it, where are those records kept? Who sells them, to whom? What happens when there are factual errors in a private profile on members of the public? What other restrictions are placed on members of the public due to undisclosed records? What political affiliations do the owners of TARGET have, and do they use their company assets for political purposes, or private law-enforcement activities? Politics and law-enforcement are regulated acitivities, for historically important reasons, right?