If you said on Facebook that the photo was yours and uploaded it you are:

a) claiming you took the photo
b) ignoring the moral right of the original photographer and claiming fraudulently that it is your own.

The pictures that were posted by Amnesia were posted by his username. They were not some random person on a website.

He has already acknowledged that he has done that before, other users on this thread claims he did it to them to. So all I am saying is that from now on he shouldn't put his logo on things that are not his.