My Medtronic pump has the auto-shutoff feature - also called the "dead man's switch" by some - and at least twice a month this has gone off. It's usually a weekend morning, and I awaken to hear the pump vibrating and screeching to alert me that I haven't bolused or touched any buttons for 12 hours. What a silly feature. If I was hypoglycemic and passed out for 12 hours, just go ahead and stick a fork in me. I'm done.
Of course I am annoyed by this alarm initially, but after quieting the silly thing I realize, hey, this is something to be proud of. I completely ignored my pump for half a day, and didn't eat or take insulin. Flat line. (I don't ignore my diabetes, though. I still check my Dexcom CGM and test periodically.)