all 3 comments

[–]bobbobbybob 3 insightful - 1 fun3 insightful - 0 fun4 insightful - 1 fun -  (0 children)

pretty sure a rootkit from a while back communicated ultrasonically

[–][deleted] 3 insightful - 1 fun3 insightful - 0 fun4 insightful - 1 fun -  (0 children)

Facebook does this to spy on you on other devices.

[–]chadwickofwv 2 insightful - 1 fun2 insightful - 0 fun3 insightful - 1 fun -  (0 children)

I'm betting this is either woefully insecure, or designed specifically for surveillance.