Mouse, My original post about a lack of physical evidence, was conjectural. If you reread it, you'll see. I've mixed conjecture with what I see as the reality of the issue and probably haven't made that clear enough.
My original question? Let me word it differently, for clarity:
This is how the hard science community should be approached, if they are holding out for samples of e.t. landing gear or an e.t. body.
Even if there was no physical evidence, the idea that intelligent life could be in our airspace, has to be considered. We should be developing theoretical frameworks to deal, negotiate, communicate with a highly intelligent race from elsewhere.
When and if we begin to develop these frameworks, we have to account for the fact that we may be the primary objects of study and therefore the standard criteria of what constitutes evidence, may have to be adjusted. Large chunks of physical evidence are likely to be withheld or just not possible to attain.
If we find ourselves in the midst of a crisis where we are about to be impacted collectively as a species we would have to take some kind of action, even if it's just to mentally prepare. In this case, expediency is required. We may not be able to acquire the evidence in time to formulate a plan of action.
Extraterrestrial intelligence is the first instance of a phenomenon that mixes what you would call pure science with strong aspects of a covert intelligence operation, where the scientists are being studied, and perhaps manipulated by a higher intelligence. A most unsettling possibility.
Now, Mouse, I'll grant you this---This is an area where hoaxes can and do proliferate, as trickery is basic to human nature. It's also an arena that is rife for a revival of superstition. This unsettles me as much as you, I'm sure. That's why it's so important that science somehow keep an upper hand here. If mainstream science dismiss UFOs as a silly subject, fit only for the addled minds of the New Age community, there is a real danger that we will enter a dark ages of superstition here, by default.
The very worst thing would be if the subject became so politicized and emptied of science, that it was treated purely as an intelligence problem and came under the control of men like James Jesus Angleton of the CIA, who become hopelessly paranoid.
Sorry if I sounded snotty in my previous post, but I've given this subject a great deal of thought as a political analyst and am trying to wake up the scientific community.