Here is a nice example of how MUFON presents UFO evidence.  The first link is the original report about a photograph with an unusual anomaly and the story behind it.

http://naturalplane.blogspot.com/2010/06/missouri-ghost-hunters-encounter.html

The second is the rebuttal from the actual people the photograph came from.  Props to them for setting the record straight.

http://naturalplane.blogspot.com/2010/06/well-its-not-first-time-this-has.html

What I find really interesting is how in the first story they add so much, such as unexplained dirt patches, supposed faces in the trees and entity/alien/spirits.   It goes to show the difference between skeptical thinking and a believer trying to validate his proof.

Yeah, I thought about that too.  I know accidental double exposures can occur, but with today’s cameras that’s pretty difficult to do.  Maybe that’s the real mystery to solve, how that picture happened if not intentional.  Once that is known, that knowledge could be put toward debunking other similar photos.