Listen
this is the way I look at it. Cameras are great. You need sound as well. If I wear a mask can you tell who I am? . You need a Recorder of some sort tied to your cameras. As voice recognition is becoming big and the theft would be more a friends or someone you knows doing. Yes cameras show evidemce or can get you in trouble your right, but if police kick your door in and take videos,.pics etc for there own evidence your cameras wont matter much. you will get the same charge as they will collect enough evidence with out your cameras. Just make sure no one shows up on (friends., family) camera or there in trouble to for growing manufacturing etc.It's legal.
Even if it wasnt, the cops around here wouldn't seek out a 4 plant operation.