Remember in Seven when Morgan Freeman is all like Hey Man we can't knock down this door we found out about this guy illegally and then Brad Pitt is all like Screw it and kicks down the door and they pay a homeless woman to say she saw someone suspicious...
Yes. Remember how that was portrayed in the move Seven far before Prism was a gleam in any NSA manager's eye? Cops have been able to do that since we've had cops. That makes transparency, rules of evidence, honest judges, and good defense attorneys important but we've already had this problem forever now.