I believe some day weŽll realize the truth ... the Xenomorph exists! Our nightmares will come true and the new order of the Xenomorphs will take over! People will be left cocooned! and FaceHuggers wil be sprawling everywhere! Next thing youŽll know will be the fact that youŽre being carried out by a drone Alien to be "integrated" into the colony! Haha! But we, The Order of the Xenomorph will prevail, since we understand the Xenomorph, we feel the Xenomorph, we believe in the Xenomorph. Acid will eat through peopleŽs skins! Kids will be served as meals! and the Queen .. ohh our Queen (my personal favorite). She will be rejoicing upon the gracious offspring of their siblings.
Anyway, I believe we are not alone.
To Mike: Actually those odds you are talking about are greater than you think. However, just like you said, for the time being, we can only speculate.