I would have to say that some people are still in the stages of "nonbelieving" even though they might have seen or heard things so unexplainable that it literally shuts them down. They won't talk about it, won't think about it, etc. because that would mean they've got to deal with it, one way or the other.
It's just so much less messy if they deny anything of the strange or weird things going on near their property. I knew for a fact that oil wells could not have made the noise I heard from the woods in 1978 less than 45 ft from my fenced yard. Yet, my choices were to call the sheriff and say "well you need to go in the woods and see what is making that horrible noise!" Seriously? Any number of scenarios could occur but the one that concerned me the most was I would then be referred to as the "crazy lady" who lives on ______ road. (And that has happened, even to some witnesses that I've known).
NAWAC has dedicated their efforts to killing one for science. I disagree...we don't need a body. The science has been done and it's very unfortunate that the scientists involved did not have the nerve to actually admit what they found. Bottom line, for me and some others, and I'm sure I'll get crucified for the previous sentence content, is this: "We need to admit that they exist, treat them with respect, leave them alone so they can take care of their families and hope that no harassment happens when they do make mistakes."
Peace