Earlier quoted context omitted.
Er, it was never a strategy in the first place? Or this is just a joke? :) But to be clear, law enforcement agents (all as far as I'm aware) are allowed to do illegal things to catch their mark. In the US at least, this is not entrapment unless they forcibly coerce you to do something you normally wouldn't; just smoking or snorting some stuff in a casual setting isn't enough, they'd have to have you more or less at g…
I'm not talking about law enforcement. Consider that many people on HN do work that the spooks would find "interesting" but would not be "illegal". As such, most of the intelligence community is not related to law enforcement. You might be surprised about just how many 3 and 4 letter agencies exist.
If your active threat scope involves governments, don't expect them to behave with regards to the laws where you are; either they don't care and will just deal with the fallout, or they have explicit approval do to illegal or wrong things.
I don't have an answer on how to check for spooks, I guess you'd have to do reverse reconnaissance, but I have no idea how feasible it is. But testing legal and social norms is not reliable; governments are not really bound by their own rules, especially when it comes to branches dealing with security or intelligence.