A lot of people raised similar objections to dna databases, and later when those same databases was used by law enforcement. It did not take very long until law makers and law enforcement made i praxis that such data bases are up to grab for trawling through. Any objection is meet with the handful of cold cases that was closed because that trawling of data.

Sadly I dont see a realistic stop to the databases. If there are none, law makers will just dictate the creation of it. If there is one, they will argue terrorism or cold cases to start the process of getting access. If car manufacturers get gps logs, those will sooner or later end up being available to law enforcement. They currently have access to every call, when where and to whom. Every internet use. Every movement mobile phones does. Every payment through a credit card, where and to whom. Mass transports get more and more into personal tickets, and those get logged.

I hope we will see unreasonable searches to be expanded/enforcement against trawling of data, but i dont have any hope left to the idea that databases wont be created. Not even gdpr in eu stops law makers from dictating that databases must be created, or stopping law makers from trawling it.