In my experience there are too many Internet commenters who post opinion as fact. Particularly where technology is involved - they're too lazy to research facts before they spout off, or they filter the facts to only allow the ones that support their opinion. They have too much fun going off on tangential rants based upon incomplete information. Then they get indignant when they're shown to be wrong.
About the same time as the NASA pen vs. Russian pencil story there were stories about the "$600 hammer". It turned out that NASA wasn't paying $600 per common hardware store variety hammer as the pundits claimed. It was an accounting mistake with misapplied development costs on a larger project. But I still hear about the mythical "$600 hammer" from time to time - especially when a political zealot is railing about government spending. Although he might be right about the larger issue (government spending) it hurts his argument and reputation when he cites myths as proof.