Originally Posted in cryptogon.com

The really terrifying aspect of this is not the technology itself, but that some group of troglodytes will actually install this on their phones on purpose.

"Repurposing the bus-tracking technology, Densebrain devised small beacons—designed to be hidden from view—that can be attached to shelves, and which emit inaudible, high-frequency sounds that trigger smartphone messages. The audio code can also be overlaid onto an existing audio track. As long as consumers have downloaded an app integrated with the technology, the smartphone will respond to the sound without user activation."

"In-store, the system could alert shoppers to special promos. At home, it could provide interactive content cued to TV shows. It could even have uses for live concerts and sports events." AdWeek

How about genitalia couplers (like in the video —yes, watch closely) that communicate with the phone via Bluetooth? You know, for those extra special notifications, like when you walk by the Nebuchadnezzar sized canisters of aerosol cHeEz at CostCo without realizing that you can buy two and get one free!