O.K., so we have this reeeeeeally smart bunch of aliens who're flying billions of miles across the universe at something in excess of light speed navigating through asteroid belts, magnetic fields, radiation belts and who knows what all else, only to crash into a telephone pole here on earth - Doh!
Or maybe they just ran out of fuel ("Captain, the dilithium crystals wunt take eet!"), or Bubba and Joe - Bob mistook their craft for game and shot 'em down wiffen their .410, "It shore looked like a possum to me!" Joe - Bob was reported to say.
Yes, people claim to have seen, and subsequently believe in, a lot of things. Bigfoot, the Loch Ness monster, cold-fusion, even ancient tales from the Bible.
The only problem comes when you try to find any independant, verifiable, corroborating evidence.
That stuff is mighty hard to come by.
geo.