That's funny and I remember my dad having similar conversations with security system salespeople whenever they'd come around the house. While transitioning from real estate sales to iOS development I took on a few jobs to cover the bills. One of which was for ADT. I met with a lot of people who had dogs and were still burglarized. My girlfriend's dog also did nothing when she was burglarized. Moral of the story, dogs are not generally good for security. They can get scared, be hurt, drugged or poisoned. If thieves are serious enough they'll get around the dog. Now on the value of ADT and others, I think it could and should be disrupted. I always felt the equipment and service were overpriced.