they've torn six trucks apart on the side of the road, pulling seats out, cutting them open and all that,
I think we're talking past each other. The "unlawful search" that's being argued in this case is private location data. But not getting your property destroyed by a search is a further non-digital protection of that same provision.
IMEI searches was the last ruling, Carpenter, that got restrictions because of a reasonable expectation of privacy to location data from cell phones.
if the system is secure enough that "Joe Blow " can't tap into it
Flock is a bring your own identity system and credentials for police departments have been found in dark web data. Police access can access it from their home computers.
that information _cannot_ be used for anything except a legal arrest or legal warrant.
Being used for an arrest is the case for harm to be protected against though... Again the open questions are when do need a warrant, with a warrant what can and what cat they search for. Without that required warrant, it's up to legislatures to ratchet down use because there's not constitutional protection. If the data doesn't have an expectation to privacy, then there's no harm in having or using it.
But, I agree, the license-plate readers and IMEI searches should be like restricted use
Great, that was the entire point. They are powerful tools that are convenient for the police and reduce costs. But that convenience should be locked behind safeguards like warrants because privacy is important. They shouldn't be able to go fishing in private data without a narrowly scoped warrant even if it hooks some bad guys.
Because it sure sounded like you thought that they shouldn't need a warrant, because if they can get and use the data without the warrant, then there's no point a warrant...