Before the cellphone and the stingrays the police have to work, now they just don't want to loose the "comfort" that gives the stingrays and similar when chasing for criminals, this is also self delusional, since the bad boys actually know they're watched and implement tactics to avoid being catched, the only thing the police does by using the stingrays is to catch dumb criminals not the informed ones.Unfortunately the US government doesn't give 2 toots about your Constitutional rights and ether does the police so no point going to them for help or relying on them to back you up. they work for the government now and it basically "Do as your told" The police have forgotten who they where established to serve and protect. Keep hold of your guns is the best advice for any American now.
Also there is a bit or propaganda and a way to self justify in a position where the legislator have nothing really good to propose, as they are dumb simple the propose barbaric things like this just following opinions without the right analysis backing it, this is an good case to identify those legislators that doesn't have the intellectual performance required by times we live.