This articlewas producedwith support from WIRED.A couple of years ago, a curious, then-16-year-old hacker named Reynaldo Vasquez-Garcia was on his laptop at his Portland-area high school, seeing what computer systems he could connect to via the Wifiusing the school network as a lab, as he puts itwhen he spotted a handful of mysterious devices with the identifier IPVideo Corporation.After a closer look and some googling, Garcia figured out that a company by that name was a subsidiary of Motorola, and the devices hed found in his school seemed to be something called the Halo 3C, a smart smoke and vape detection gadget. They look just like smoke detectors, but they have a whole bunch of features like sensors and stuff, Garcia says.As he read more, he was intrigued to learn that the Halo 3C goes beyond detecting smoke and vapingincluding a distinct feature for discerning THC vaping in particular. It also has a microphone for listening out for aggression, gunshots, and keywords such as someone calling for help, a feature that to Vasquez-Garcia immediately raised concerns of more intrusive surveillance.