logic101010

Welcome to police logic!

Sounds like you agree entirely with the poster's final comment :

"They unreasonably cast suspicion on everyone without any good basis and reverse the accepted safeguard that your guilt requires to be proven, and replace it with the idea that you require to prove your innocence."

Your DMV example is not quite the same as what is being done. If it was, it would quite probably be reasonable in the circumstances.

The dragnet is every device, not just those matching a partial description of a suspect. For it to compare with your car example, the police would need to have a description of a suspect using an Android Galaxy S4 (or whatever) and then ask only for Galaxy S4 devices in the area.