Area 51 is a bit of a unique case in how incredibly mythologized it is. I've never been, so I can't speak from firsthand experience, but my understanding is tha

Area 51 is a bit of a unique case in how incredibly mythologized it is. I've never been, so I can't speak from firsthand experience, but my understanding is that it's not so much that the boundary is ambiguous as that the people guarding the facility are sometimes overzealous. In any case, those guards, like the signs, are declaring the presence of a military facility. While the Air Force might prefer that no one really knows what they do there, there's no doubt that it's a military facility. It's a perfect example of why the phrase "undeclared military facility" doesn't make any sense at all.