I've given your post some thought, Rainboe, and refined my escape plan.
Should I be involved in an on-the-ground hijack attempt, I am going to disable the aircraft prior to my escape attempt by pulling the starter and ignition CBs, then chipping at the collars to make sure they can't be reset.
I'm sure my employer would rather have me do that than watch an airplane full of passengers comandeered and taken off by a hijacker/pilot. No need and no time to destroy the entire CB panel and the bus behind it. It's a life and death matter and my emergency authority covers that decision. You do what you want on your airplane.
Also, not all airliners are new, with electronic fire handles. Some older handles will actually pull out a foot or two of cable as they mechanically close the pneumatic, fuel and hydraulic shutoff valves. Good luck in trying to push them back in. Most evacuation checklists call for pulling the fire handles, anyway.
So take your head out of your hands and think it through.