All I can say is that I think you all are lucky your boxers talk to you...our rescue, Jazz, must have been punished for any sound because we don't (yet) get any woo wooing, whining, or anything else. The only time we have ever heard her bark is when she is outside guarding the fenceline from the one neighbor she doesn't like!
But it makes sense that ignoring a behavior you don't want would be the best way to make it go away.