Code is law, they say. ... Geofence warrants are warrants to obtain the location data that Google users let Google collect if they opt in to Google's location history service, which about a third of Google users do. Geofence warrants have been possible because, if you opt in, Google keeps a copy of the location history. And records are kept can be compelled, at least if the legal process is valid. All of which makes this Google announcement from yesterday of great interest. Google will no longer keep location history even for the users who opted in to have it...