I'm not talking about the cartoon shotgun stuff, but the source of the claim (i.e. the text and the paper it's written on). Unlike outlandish stories such as the holocoasters, piles of shoes, teeth, etc, and skeet-shooting of jew-babies, this particular one isn't "official" and is not recognized by the yids. If I had to guess, someone made this up to make holohoax skeptics look bad by making it seem that we just believe anything we see on the internet.