I would always set that setting at night. What if someone got in your house while it was disabled and hid in your basement? Or a closet? Night is when I'd most likely set the motion sensor, because I watch too much criminal minds.

Because sometimes people need to get up in the middle of the night to pee, or for a drink, or to let their dog outside because it'd about to have diarrhoea all over floor.

I had a cat, and because of it we needed to change the motion sensors to break-glass mode. Having a pet makes the motion sensor kind of impossible, doesn't it?

if someone got in at night, it'd go off anyway. there'd be no need for them to move and trip the motion sensor, we had a cat as well who would set it off at night if that setting was active

I was home alone one night and my alarm went off. I was positive the garage door has just popped open enough to trip the door sensor, as it sometimes does. I answered the alarm company call and said I was fine, then hung up and went to close the door. It was already closed. I waited for 20 minutes in sheer panic until I realized that if someone had come in and hid somewhere, I was probably going to die regardless of my next move, so I went back to bed. I would have loved a motion sensor... though I probably still would have died.

thats what i thought too