Humans are indeed an extremely aggressive species in a number of respects; but I don't believe there is a conspiracy to keep alien visitors hidden from the public. Rather, I think it's more likely that this whole subject (and a few controversial others) are exploited to keep the population distracted - so, a form of population control, if you will.
EDIT: Just noticed you added something else to your answer, and updated accordingly.
EDIT: Just noticed you added something else to your answer, and updated accordingly.
You betray yourself: humans refers to members of the genus Homo.
And is also commonly used when referring to Homo Sapiens (or Homo Sapiens Sapiens, if you want), for obvious reasons - or is that your way of saying that I've betrayed my cover, and that in reality, I'm an alien?
Previous posts commanded an intellectual authority that would amount to greater nonmenclatual accuracy than that.