In my lifetime I've read about many varying kinds of threats on people's lives. Sometimes it's a former spouse who threatens to kill us, sometimes it's a perp, sometimes it's a molester who threatens a child with wiping out their entire family if they "tell". But sometimes I've read about cases where LE, or even worse, government officials, have threatened people's lives. I have no way of knowing if the latter threats are real, but they would certainly give me a reason to pause before going to any kind of authority figure with my concerns. After all, if LE is threatening you, it's hard to feel safe going to LE with your concerns. There was a case a few years back of a woman married to (I believe) the Seattle Chief of Police. She tried to talk to some of the officers about his constant threats to her, but nobody believed her and the SPD sided with the husband. He finally killed her. Obviously, this doesn't quite fall under the category I just described about LE and/or gov't officials, but it's still a keen reminder that sometimes the very agencies in place to help us end up doing nothing or, in a worst case scenario, thwarting justice.
So what I guess I'm saying is that I think there are different levels of threats on our lives that we have to take into consideration when deciding whether or not to go to LE with our concerns. It's more than a little difficult to hide from some agencies since they are privy to every kind of background and address information on all of us.