I think skepticism can go to the same kinds of extremes as believing. While a significant percentage of reports is surely a mixture of crackpots / people with unknown agendas, I find it hard to discard just about everything on one of these basis.
That many people are heedless, shallow of thought, and frightened of ignorance in similar patterns should not be taken as evidence that _some_ of their flights of fancy are fact.
Anyway, personally, I think this is a topic that needs serious skeptical focus. I don't just want immediate knee-jerk reactionary opinions on what people saw -- I want honesty as new information is gained. New thoughts on what you saw? Give those updates.
I hope that we're not alone in the universe and, honestly, I think it would probably impact me more if we were alone in such a vast *thing*.