They probably already have a camera in your house:
- http://www.motherjones.com/politics/2014/05/blackshades-malware-remote-access-webcam-fbi
- https://www.slashgear.com/samsung-smart-tv-a-spy-in-the-living-room-as-webcam-hack-revealed-02292655/
- http://www.ibtimes.com/your-smartphone-spying-you-phone-cameras-microphones-risk-hacking-expert-says-2495527
- http://www.spiegel.de/international/world/how-the-nsa-spies-on-smartphones-including-the-blackberry-a-921161.html