Russell Crowe claims he has caught a UFO on camera. Many others refute this claim by "explaining" the visual effect seen with a much more "logical" way. (1, 2, 3, 4)

It is true that UFO camera pictures are often attributed to mirror lense / optical system distortions from a passing sailing boat.

But what if our sense of vision if not a collection of such "distortions" in our optical system lenses?

Who has the authority to decide which distortions are "valid" ?