If those kids or elderly parents aren't capable of doing the right thing if a smoke alarm goes off, they shouldn't be home without someone present that does know what to do. If there is a fire they need to know they have to get out, if possible. waiting for fire dept to rescue them when they can get out is not the right action to take. Calling mom/dad to ask what to do isn't right action either. If they are old enough to be alone they need to know you get out of the house when it is on fire, then you call for help or go to neighbor's house or some other planned action for such emergency. Kids that aren't really old enough to be left home alone often still have this ability to know what to do.The only thing I worry about is something like parents using it to "keep their their kids safe" when they come home from school with nobody home. Or maybe elderly parents.