http://www.foxnews.com/story/0,2933,349412,00.html
You're not paranoid if they are actually watching you. But, let's face it, it is extremely unlikely. But it's not impossible. Unless I know you, there is no reason for me to pay the money to get all this spy gear, break the law installing it, and then watch crappy video of you. There is much better stuff on the internet.
The problem is DC power. All video cameras still require power. Unless you are dealing with an unnamed government agency, it is unlikely that they will have the technology to power very small cameras for any length of time inside your house. And if the amateur versions were in your house, you should be able to spot them. Look in the air vents, fire alarms, clock radios, lamps, air cleaners, light fixtures, motion detectors, exhaust fan, floor vents maybe even outlets, etc. Anything that is plugged in makes it a lot easier to conceal a camera in.
http://www.spycentre.com/wireless_video.htm
http://www.discountspyoutlet.com/dev...earchdbdisplay
(I had to go look at my motion detector to see if it was one of those.
The second version is cameras outside your house looking in. But, you have blinds/curtains to reduce their effectiveness.
If I had to guess who the leak is, it would be your housemates. They may have seen something and mentioned it to the landlord earlier or something. Or they are the ones spying on you, not with electronics, but just listening in on stuff.
If you still are paranoid, you can always use your toys under the covers.