It didn't came directly from WoD, but WoD was the reason and the motivation for them to exist. When you're talking about catching burglars and car thieves, you don't really need this kind of powers. But when you have moral panic that enables "all means necessary" approach - "OMG, drugs, think of the children!" - and you have police that is battling this war for decades and losing it, and thus feels it must up their game because nothing they did so far is even remotely close to working - then you get a perfect conditions for this kinds of abuse. It's not about drugs specifically, it is the conditions that WoD creates in the society and law enforcement that create this mess.
And yes, some of the things alexeisadeski3 listed make no sense. But again I suspect he listed them mainly because of the abuses that were perpetrated - if FBI only ever wiretapped mobsters, I doubt anybody would be ever objecting to it. In theory, mobsters have the same rights so it doesn't matter, in practice it does - all these things are created to protect good guys from bad guys, and if instead we have bad guys fighting even worse guys, on the way trampling good guys, then good guys would end up saying "WTF? A plague on both their houses!" That's how I see what alexeisadeski3 wrote.
And yes, some of the things alexeisadeski3 listed make no sense. But again I suspect he listed them mainly because of the abuses that were perpetrated - if FBI only ever wiretapped mobsters, I doubt anybody would be ever objecting to it. In theory, mobsters have the same rights so it doesn't matter, in practice it does - all these things are created to protect good guys from bad guys, and if instead we have bad guys fighting even worse guys, on the way trampling good guys, then good guys would end up saying "WTF? A plague on both their houses!" That's how I see what alexeisadeski3 wrote.