I will dispose their faces if they don't start putting power switches on things that should have them - especially things that are expensive already so it shouldn't be a matter of cost.
I used to have a metronome that had no way to turn it off. Seriously. It would run until 15 minutes had passed without you changing anything. And God help you if you actually wanted to practice with it for more than 15 minutes at a time, because like it or not, it was turning off after 15 minutes. I hope whoever designed that died of shingles while burning in a fire and passing a kidney stone.