What's The Frequency Kenneth?

I was reading an article in Computer Power User magazine(more about that name later)that floored me. It wasn't really an article, more of a side bar. The gist of it was that RCA has developed a device that you can plug into your mobile phone that will suck the energy from WiFi signals to charge your battery. It's called the Airnergy.

I know...that's what I said. But Gizmodo has a write up on it too.(On the internet, must be true, etc.,etc.) So this thing converts Wifi energy...great, so why aren't we converting radio waves? Are they too weak? Will it distort the signals so Lady GaGa or the Black Eyed Peas will sound lamer than they already do??
I'm not an Electrical Engineer...I can install a ceiling fan, so, yeah, that's the exetent of my knowledge. But, I immediately envisioned people modding these things and hacking their Priuses(Prii?)to take advantage. Imagine a herd of them parked outside a Starbuck's feeding off the wireless teat of the global caffeine giant.

Ew.Anyway, more Priuses that currently congregate outside a Starbuck's.

As far as the name of that magazine goes: Pure Genius. No, I'm not talking about the clever abbreviation of CPU. I'm talking about having the "Power User" in the title of the magazine you're reading.
"Yeah, I'm a Power User baby...overclockin'!" Well, maybe not.But I'm sure someone thought that would be a good idea. Kinda like how I always have a copy of the Scientific American in my back pocket.