Best practice is to remember that intelligence means optimizing for some state of the world. If you have a "smart" product, it may not be optimizing for your preferred state of the world. Most commonly, it's not even optimizing for its manufacturer or vendor's preferred state of the world, because we don't truly know how to design a specific intelligence yet.

Our best efforts are just kind of putting in some objectives and hoping they don't get goodharted too badly.