You shouldn't joke about that Jeff.. I bet it has happened. Snakes have eaten cage light bulbs so I'll bet you plants have been taken as well.
I once knew a guy that had his cal King eat a bloody branch, just because it smelled like mouse.
He told me the snake actually passed the branch, and then shed..LOL Must have been nutritious.
I think the odds are small but if plastic leaves get stuck to food and ingested, it could be all over.
Christina, just make darn sure those leaves stay on the vines, and loose ones don't get accidentally stuck to a wet thawed out rat.
I use to play around with both real and fake plants in snakes cages many years ago. I eventually gave up, because they wreck and crap on both, and they don't stay looking attractive for very long, unless you have something like lazy Chondros, that never move