The argument with Stringrays is that even with a warrant to target an individual the police end up sucking up a large amount of random people's location and cell phone data.

Like license plate readers and facial recognition, you're out in the world without the expectation of privacy but I think for most people that feels different when a giant automated system is sucking everything up without recourse.

WHile I don't expect privacy, I want it, and I want other people to really think about it and not want public surveillance as well. We should have some expectation of privacy out in public and not allow a loophole of "oh, but we were looking for someone else but also saw you", it's a huge loophole with essentially no limits. A warrant should cover one "thing" a person, group, etc. Anything else grabbed in the process should not be admissible in court or even be used by the police.

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