We know there are a lot of scams, who the hell would be that stupid to get scammed with a photoshopped picture, but don't talk if you are not providing legit arguments.
I can think of quite a few recently here on bitcointalk. Dwarfminer comes to mind. You ordering 14 ASICs on a site with no reputation...I would call that stupid, but thats just me.
I think the warnings are well deserved. I don't care if you or anyone heed them but don't come back crying then, like the Dwarminer victims. They were told muplitple time, they still bought.