I can understand that: (a) an alarm system such as that would make me feel like a prisoner in my own home; (b) they are frequently ineffective. My son's alarm system blared for an entire weekend while he was out of town--much to his chagrin and the unhappiness of his neighbors. However, there was no response from police or anyone else.
Here where I live, the police fine you after their second trip to the home due to an alarm sounding. We had to shut off the police-notification part of our system because the dog kept setting off by jumping on the glass door. She is probably more effective than the alarm anyway. BTW, alarms can be set to go off only in the house, quietly, without waking the neighborhood.