For my setup I use a server rack power rail similar to the one attached for the very reason that one plug turns everything off. They're available off Ebay dirt cheap, or if you have a mate in IT, he should be able to get you a couple for free.
You could even re-terminate the plugs into IEC plugs and use a rail that has inbuilt IEC clips for a really firm grip that won't vibrate out.
cheers, Ian