Its not about invading privacy, but rather about illegal handling of private and sensitive information.
The information about who is where and when is information that should be treated in similar way as credit cards numbers, medical information, and so on. Repo agents do not actually need to store this for their businesses, so their argument is easy refuted by simply denying their ability to profit by selling sensitive information about peoples private life.
If I'm walking on a public street, then that isn't private information - unlike medical information that's entrusted to some specific people bound by restrictions, what happens on the street is public data. And I'm perfectly allowed to say "hey, you know what? Yesterday I saw Belorn walking down that street!" no matter if you want to hide that - it's not dissemination of private and sensitive information.
If you feel so, I hope you don't mind if someone like the police create live 24/7 tracking of your position. Any driving, any movement... always tracked.
If don't consider that a intrusion of your privacy, then that is up to you.
I agree public street is public info. But it sounds like they're scanning more then public street. At what point does it become private?
1. Parked on a public street in front of my home
2. Parked on private parking lot at my apartment
3. Parked in my driveway
4. Parked in my garage with door open.
5. Parked in my garage but visible through window if you angle the camera just right.
I believe that question has been asked many times in courts and is settled long ago. Your examples 1.-4. would be treated as "in plain view" (if seen from standing on that public street) and 5. wouldn't.
The information about who is where and when is information that should be treated in similar way as credit cards numbers, medical information, and so on. Repo agents do not actually need to store this for their businesses, so their argument is easy refuted by simply denying their ability to profit by selling sensitive information about peoples private life.