This is how the KGB, Stasi, and other secret police organizations work. It's a way to extra-judicially monitor and control the population. This should give you pause for thought. Law enforcement that the public can trust is a big deal. Our government already bends the laws quite a bit to suppress dissent, we shouldn't enable them to do more of this.

It's a lot more straight-forward if the police investigate crimes reported to them by citizens. That's what they are supposedly there for, right?