Here is another reason to be worried about cyber stalkers and hackers.

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Your smart TV may be a vessel for those with the ambition and knowledge to record your events in your house and the audio through the camera and microphone on the TV.
This didn't happen with the old TV and rabbit ears!
Experts say to disable the microphone on your TV and even cover the camera!
In an article from ZDNET.com:

The FBI recommended that you change your security settings, and, if possible, change your passwords. You should also know how to turn off your TV's microphones and cameras. If you can't turn off a camera, you can always put a piece of black tape over the camera lens.