White-hat hackers have exposed the privacy shortcomings of smart meter technology. Researchers from M..nster University of Applied Sciences were previously able analyze smart meter data to identify the power consumption activity for a refrigerator, stove, and television. They showed that the type of LCD TV set could be identified, what TV program was on, or if a movie was playing from a DVD or other source. Researchers said they could determine if a particular movie had been watched based on two-second relay data held by Discovergy and accessed through HTTP GET requests.
Source: https://thehackernews.com/2012/01/smart-hacking-for-privacy-what-tv-shows.html