I have seen more totally wacky photo analyses of photos of Barry than of anything else. And this is yet another one, if for no other reason than it posits someone expert enough to have made a composite but who leaves—supposedly—glaring, easily spotted errors.
But some of the errors you can see without having any qualification other than a pair of eyes. There really isn’t a second shoulder on little Scott. The highlights in the eyes really don’t line up.
I do see your point, though. It’s almost like the people who did these photo “forgeries” were thumbing their nose at those of us not enthralled by the One. It’s as if they were sending a message - we can pull this off because there’s no established forensic field of expertise for evaluation of digital images - and we want you to become very frustrated knowing they are faked while at the same time not being able to absolutely prove it.