[quote=thewizardguy]
No, you'd need to hack each substation individually. He could have a subsystem for every ten cameras, with one-way encryption that would prevent them from being hacked from the larger subroutines. Furthermore, one would need a connection in the first place to hack the cameras. They'll all be on closed systems, which means someone would have to find the control hub for each substation and connect to it directly.
[/quote]

A feedback loop dosn't work like a hack, we call it a 'brown box' due to the effect, it basicly loops the feed from every second, in addition to all the previous ones. and the thing is, it stacks, so when the first 'stacked' loop gets through, it fixes itself in the next waypoint and loop all that's comeing through, and then on ot the next, and the next, and the next. it works by overloading the system to a critical level.

I've used it on the campus phones to great amusement.