A blog called "Colorlines" has a story with a headline that is not supported by the story itself: "Even Gun Enthusiasts are Disgusted with Trayvon Martin Gun Range Targets."
Nothing in the story that follows suggests that; actually, it sounds like the targets are big sellers.
Still, let me go ahead and provide him with the evidence that he is lacking. I'm not sure if I really qualify as a "gun enthusiast," since I prefer blades to guns; but I do own, and sometimes enjoy shooting, several guns. I think that the target is a pretty low thing to do. The Martin family is going to have to see that. Whatever your thoughts about the case -- and the facts remain somewhat murky -- simple human decency ought to outweigh any thought of money to be made.
Nevertheless he says he was motivated by the hope of money; and apparently he was rewarded. When something is rewarded you get more of it. Expect more of this, with all attendant consequences.