Interesting question. I sat as a passenger on a Northwest 747 a few years ago at Washington Dulles in December in freezing rain. We were still at the gate and I watched the port wing be deiced. As the truck moved to the other wing, I could actually watch the ice reaccumulating. At that very moment, the FO came on and said we would be pushing back as soon as the truck had finished the other wing. I was up and walking to the front with my carry-on bag and thankfully just as I was about to tell the steward I wanted to get off, the FO came back on and said we'd all be disembarking because the ice was reaccumulating too fast.
I imagine most readers of this board would have done what I did and I don't think there is any way one can be stopped, or is there? The door was already closed.
QDM