Is this part of the "criminals have rights too" crap? That is infuriating! These people that break in intend to do harm, steal, and possibly kill to get what they want. I believe they don't deserve the right to privacy if they break into my home.In my home I check the one closet in the hall between my room and the kids room then wife and I both move to kids room and hole up there til cops arrive.
On the subject of cameras. If not installed by a licensed security company their video is not admissible in court if ever needed. Audio recording is something you have to be very careful with as you are infringing on people's right to privacy (yes even in your own home, especially outside). In fact you will see many cameras or systems that have audio capability are "live" audio only. I'm not saying not to do it but you should check your local laws regarding this and comply. More then likely signage will be required. Feel free to PM me with any questions.