Shhh … Alexa might be listening

Amazon has filed a patent that could allow its Echo devices to one day listen in on conversations to help with user recommendations. A handy feature or more fodder for conspiracy theories?Should you whisper around your Amazon Echo, lest it whisper back to you?That’s the future suggested by a patent recently filed by the company, which examined the possibility of eavesdropping on conversations held around its voice-activated devices in order to better suggest products or services to users.