ZZ,
I'm guessing you know who this is, too.
I've heard accounts from the folks who were down there, and the folks who were there on the investigation, but that's a new one on me. I haven't heard any discussion regarding fire switches at all, but like you say, anything is possible and of course...nothing new under the sun.
I believe the sequence of events really precludes that scenario, as it wasn't the fire switch that caused the subsequent events. Then again, it's still an open case (and a delicate one, as you can imagine). For now I'm content to wait and see what unfolds. --AB