If human beings are behind the Hum, then I would suggest that they examine their own behavior, and note that perhaps the truth might eventually come out. A person of integrity would take proper action immediately. Self-interested people would not care about the public. Self-interested people would try to maintain the secrecy, protect their own butts, and set up their collegues to take the blame when their victims learn the truth. There is a simple term for this.
Evil people protect themselves before all others.
They rightly should be afraid. My hope is that there are some people of integrity in the US military. I pray that the Hum is a natural phenomenon. Knowing human nature, I strongly suspect that it is not. Such an act would destroy their own career.