the problem is that exploiting linux doesn't require breaking a complex lock, since you can view the source code you just have to look through and find the weak spot. So it is less enjoyable for hacker, there is a certain joy we receive in making an electronic device bend to our will after hours of coding.
Over the Air Data is all that really matter when comparing wireless providers. Wifi is nice as it unburdens the carriers network, but this report is how much network bandwidth each carrier can handle on average per month.
then run it at the prescribed time. I would then check to see which channels are not effected and move your wifi accordingly. Also my guess is that some one may have a router with the same SSID as you they are turning or something like that. I won't necessarily tell you what is causing the problem but it should help you on your way.