One potential scenario could be something like managing the Netflix connection for the back seat entertainment systems but giving priority to real time urgent information when needed, like when the vehicle in front of you needs to pass along information that there has been an accident a half a mile in front of you and you need to slow down quickly.

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The real question is whether there are limits on how much publicly available information the government can collect before it needs a warrant to go further, Alito said.

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