If you don't some of your neighbors might. I installed an app to control my AC remotely and when i pressed the button to add all units in range it automatically added one more than there were in my apartment. I had complete control over the AC unit of some unsuspecting neighbour - I could see its status and control everything from my phone anywhere in the world. I suspect it's not that bad for fridges, but you still might be able to do some harm there as well.