I'd argue that in an ideal world, a fridge wouldn't have networking capabilities!

Even if I don't buy one, I dread to think of what might happen if enough fridges across the world stopped working all at once (demand for non-perishable food and fridges would skyrocket).

For the sake of consumer safety in our imperfect world, there should be a safe-mode hard switch fallback for any life-critical and/or high wattage device that gets networked.