For his senior project at Bauhaus University Weimar, Weng Xinyu designed several household objects that activate when you're not using them. The title of the collection is "Good Medicine Tastes Bitter," which is a proverb by Confucius.
Xinyu askes, "Do products always have to satisfy the users?" I'm inclined to think so, provided that you want to sell those products. But Xinyu wanted to design household goods that frustratingly send moral messages to owners.
For example, this clock has a motorized saw blade inside. There's a motion sensor in the front of the clock. When there's no one in front of the clock, the saw blade activates, cutting away at the clock and symbolically cutting away at the limited time that we have in life. You can watch it in action in this video.