LemonySnicket, you beat me to it!
I don’t have internet on my iPod touch, because I, personally, don’t like the idea of having constant internet ‘On The Go.’ And, if truly necessary, you can download apps via iTunes off the computer, no need for iPod wifi 🙂
But if you find it an issue, block it!
Otherwise, I’d also be interested to hear what others have to say on the matter 🙂