Restricting Wi-Fi access

Is there a way to block access to neighbor's wi-fi network? I'm trying to restrict kids from internet after hours. I can control access to my router, but not all my neighbors.
Any ideas?

I wonder if we can clarify something here, are people saying that it is not possible to switch off the WiFi at all on the Ipod Touch itself? or are people saying you can switch off WiFi & all connectivity if you want to, but if your kids wanted to turn it back on they could??
The latter. If they know how, switching WiFi back on is trivial.
Sorry to bear bad news. If you feel this is important to you (and it seems to me like you do) you might want to submit feedback to Apple at http://www.apple.com/feedback/ipodtouch.html. You won't get an answer back, but feedback is read and sometimes good things come of it.
Oh, and I agree that it would be a good thing to ask your neighbors to protect their wireless networks. Running an open WiFi network is a very bad idea. What happens if someone uses it to do illegal downloads?
Best of luck.

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