About a week ago, I set up an automation that "When the first person gets home" opened my garage door, unlocked the front door to my garage house, and disarmed my security system. There are five people in the home with location-sharing iPhones who are part of our home group. We had a strange confluence of events last night that led to a very unintended result. With three of the iPhones belonging to teenagers in the family, there is almost always someone in the house with an iPhone 24/7. However, last night all three teenagers spent the night elsewhere. When I got off this morning, the garage door was open, the front door was unlocked and the security system was turned off. Needless to say, it was the most worrying. As I tried to figure out what had happened, it occurred to me that at about three in the morning, when I was making a late night trip to the bathroom, I turned on my phone, and since my wife's phone was off, HomeKit saw the phone on and registration in the immediate vicinity of Home as the first person to get home. Therefore, the execution of automation that led to the security vulnerability. I thought I would share my lack of foresight so that others would not experience the same trap.