May be my confestion will spoil again my low reputation, but I should tell that I wrote an article about UFOs. And I think it was rational.
Because even slightest probability that we have unknown phenomena in our sky should be taken in account when we speak about existential risks. Also I use Baiesian path of weighting different hypothesis and calculating expected negative utility associated with each.
“UFO as Global Risk” Alexei Turchin, expert on global catastrophes of Russian Transhumanist Movement
Version 0.910, 5 Jan 2010.
Abstract In this article are discussed global risks – i.e. risks that could lead to the complete extinction of mankind, – associated with the problem of UFOs. Although the author is on 90 per cent sure that the UFOs are some common phenomena, the remaining 10 percent are forced him to consider these risks seriously. In the paper is suggested almost complete list of possible hypotheses explaining the nature of UFOs, including a number of new hypotheses (crown discharge around human body, ships from other dimensions covered by the shell of liquid metal, alien nanorobots, conspiracy of suppressed unconscious parts of self, parasites-symbionts from unknown forms of matter, bugs and viruses in the Matrix, etc.) and assessed the reliability of each of the hypotheses and the risk that relates to it. I consider several factors of global risk that may be associated with UFO (intelligence, energy, specific form of toxicity, informational effect, global power), based on observational data. The work is intended for a wide range of readers, as well as for anyone interested in existential risks. This work does not reflect the official position of the Russian Transhumanist Movement, or of any other organization and is only my personal research.
Permalink: http://www.scribd.com/doc/18221425/UFO-as-Global-Risk
But in order to colonize light cone at least one AI must be relised. This may be real hidden catch.