I'm not sure what you're upset about. Almost every LE agency has access to these devices and uses them regular for lawful searches during investigations. I saw nothing in the article that implies they will search your phone without a warrant and then use that information to obtain a warrant. I think you may not fully understand what the term "exigent circumstances" means in the context of search and seizures. And I don't mean that in a condescending way either as 95% of the population doesn't either. LE can conduct a search of constitutionally protected areas when they have one of the three present; a search warrant, consent, or exigency (exigent circumstances). This applies to everything including cell phones. The courts are also extremely critical of the use of the latter two warrant exceptions with the burden of proof resting on the prosecution that they were conducted in good faith and with sufficient grounds. While the system is far from perfect, the implication that LE is using these devices during criminal investigations for nefarious purposes without adequate judicial oversight is simply not true.