When "smart" switches turn dumb and you can't turn them off manually because they think to be smarter than you. On a more serious note, when designing a system

When "smart" switches turn dumb and you can't turn them off manually because they think to be smarter than you. On a more serious note, when designing a system it's very important to consider the failure modes of such system, and having lights that can't be turned off manually on case of failure isn't a good fail mode. I would call this a bad design.