https://www.sciencedaily.com/releases/2023/04/230425205142.htm > If you raid the pantry at 2 a.m. for a snack, your smart lights can tell. That's because they track every time they're switched on and off. > Your Roomba knows the size and layout of your home and sends it to the cloud. Smart speakers eavesdrop on your every word, listening for voice commands.