Kevin Elgan believes that the best technology is the kind that gets out of the way—it doesn’t have to be on your wrist, in your hand or at your fingertips to add value. That’s why people, himself included, love smart speakers so much, he says. But smart speakers, such as the Amazon Echo Dot and the Google Home, which function almost like virtual assistants, come with a catch. Reports surface regularly of them turning on without being prompted, listening in…