Totally different than guard dogs. The camera does not alert you if you are not looking at the screen. A gun doesn't wake you if someone breaks in. A camera needs batteries. And neither gun nor camera will cuddle with you.
A camera and guns only work as a deterrent if people know you have both. A dog will alert the person to his or her presence immediately. A gun doesn't know the difference between friend and foe. I could go on and on ...
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