As a bit of information, it seems Hawking must have made his remarks regarding avoiding aliens in a press conference following his lecture at George Washington University, as the transcript does not show he said anything of the sort.
http://ims.ivv.nasa.gov/pdf/223968main_HAWKING.pdf
Alien content begins at the bottom of page 19.
Hawking totally discounts UFO observation reports, but then states
"DR. HAWKING: If there is a government conspiracy
to suppress the reports and keep for itself the scientific
knowledge the aliens bring, it seems to have been a
singularly ineffective policy so far."
So my question is- if there isn't any significance to any UFO observation reports, then why even bother mentioning the possible existence of suppression of UFO reports?
Seems a bit of a waste of time. So why say it? Hawking is apparently a very smart guy.
Just seems odd to me.
I have not read most of this thread but I have to say that I do not understand what you are getting at here? Hawkings was asked about whether there is alien life or whether we are alone. A fairly standard question. He laid out in simple terms what the main possibilities are. He is as aware as you and I that UFO's and stuff are much discussed and that they are interesting to the public. He dismissed them and the conspiracy theories which surround them. Why would he not do that? Do you expect him to be unaware of the public interest? He is talking about engaging people with science: popularising it. Do you not think that addresssing the issues which are most talked about is a good way of doing that? And debunking some of the wilder fantasies is part of it? He introduces this with humour (it is noted that the audience laughed so that worked out quite well) and goes on to make some quite serious points. What is odd about that?