One new crew-member nicked too many eggs, etc, at a crew-house years ago. I put a bat against the fridge, and taped a large sign to the door saying: "Next person to take anything without asking first will find this jammed in places the sun does not shine!"...Needless to say, the theft stopped from that point onwards!
Unfortunately, I am too lazy nowadays to pound useless sense into those who have none. Besides, having taped proof of the thief in action will be a guaranteed one-way-home for the person with the light-fingers where we are residing. You can't say they didn't ask for it!
Some of these cameras have tilt, zoom, audio, and sensitivity level settings, etc. Pretty neat stuff out there.
As for security with wireless, there is a lot of hardware and websites that help you set up a secure system.
~Ray Darr