The same people complaining about the Patriot Act and cheering on Snowden for publicizing NSA PRISM are the same people cheering on govt mass triangulating civilians.
Turning your phone off or leaving it at home is already used to identify suspects.
Not so great: surveillance on everyone and catching criminals with it, but within a democratic framework
Disastrous: surveillance on everyone, while giving a pass to insurgents attempting to overthrow democratic governance, because if they take over the surveillance infrastructure you're doomed
Either way, no sympathy for these hypocrites.