Yes--this is something that decent parents should have taught their children how to deal with for the sake of other people. What ever happened to teaching basic social skills so that people, once older but not quite adult-like, would have manners and self-respect?

Even if it does work, who would want to be sitting next to people who are doing this right next to you and pretending that they are not?

With better socialization of children, our society wouldn't have to turn to silly inventions to undo the damage.