> As long as a judge issued the warrant for geofence data, I see less wrong with it. It passed judicial scrutiny, AND can itself be challenged.

The cops say "someone committed a crime in this area, we need to find the perp". They can pretty much say this for any part of the town at any given time. A judge signs off on the warrant, because why wouldn't they? You don't get to challenge anything: no one is going to tell you "hey, your phone was in that area, come to the courthouse and make your case if you think the police shouldn't be given that info".