Originally Posted by oskar
why did it stop ?
It's most likely because everyone's been barking up the wrong tree since the Airship flap of the 1890's.
100 years; We know just as much today about these things as they knew then.
Also, internet culture. If you wrote a book in the 1970's about Joe Blow's awesome UFO sighting and the flap over Anytown, USA, and it were interesting, people would eat it up. But now, with the internet, we could go do our own little investigations and find out that "Joe Blow" is just an idiom that Americans use to denote an ordinary member of society, and that Anytown, USA isn't even a real place.