Until reading this blog, I had no idea such a gimmick existed: getting a notable to sign a blank sheet of paper, then manipulating it with photo of the signer. Good grief, why do people want to undermine the integrity of signed-photos?
Before he died, Frank Sinatra did a CD of duets with more contemporary singers performing some of his standards. I later found out all he did was lay down his track of the song, then the contemporary singer recorded his/her track, and the two tracks electronically blended. Thus Sinatra and the other singer weren't even in the same studio on the same day recording the song together, although that was the impression publicized.
Such manipulation for commercial reasons is unacceptable.