Skimming. The New Scourge?

I'd appreciate your opinion about this article entitled, "How To Build a Low-Cost, Extended Range RFID Skimmer." In case you're unfamiliar with how this works, simply place your cursor over those highlighted words and click... it'll magically take you to this story.

What I want to know is two things: do these guys know what they're talking about and, two, if they do, what are the real implications of what they're saying. Is 'skimming' about to become as well-known a word as virus, bot, trojan, worm, etc etc?