The entire world is filled with so much information absolutely everywhere. Everything is constantly leaking it out, blasting it in every direction. One of the most worrying potential capabilities that could rapidly emerge in AI is collecting and finding patterns in this information.
Look at examples of side-channel attacks for computers, and then realize that AI has the potential to have side-channel attacks for… everything. It’s pretty scary how much you can narrow down guesses when you have a few pieces of information. Using WiFi to learn about a physical space is just the surface.