Since the issue of "shopping" has come up again, I thought I would repost a few old links on fakery. The easiest thing for the photo below would be to search Google to see if anybody else has used the image. Failing that, there are a few online sites where you can upload and analyze photos (here's a link
to the analysis page, and here's an explanation
of Error-Level Analysis). You can see the different compression levels for the cluebox.
And for some light reading...you can read about fakery here
and some historical fakes here