Now I have got it.

A mob from outer decides to fly to earth and goes through all the dangers of doing it. When they get here they decide that the best possible thing they can do is NOT to get a meeting with the United Nations or land on the lawns of the White House and talk to the most important guy in the world, they simply turn up for a tourist trip and let people take photos of their space ships. Boy, how dumb was I, obviously they are all just tourists.

Like in all reality: If you have one picture of a UFO it is ODD.
If you have two pictures it is very ODD.
If you have a whole website full of them they are all VERY ODD. There is a better word, it is has to do with cows.

Show me just one and I will show you how it was faked, no matter how old it is supposed to be.