There are no barriers to good or bad manners. I can perhaps excuse young people bad manners as they may never have been taught -but pension age people who have the most dreadful manners , no excuse as they come from a generation where manners were instilled into you. In my retail unit I see all sorts. Recently I served a well-heeled couple who had the most dreadful manners (how much is this? then shove item on counter, pay and leave without further eye contact or dialogue) and then a lovely young couple with little children who had manners to die for, it was lovely to see. It seems to be getting worse, not saying please and thank you so something must be to blame and its probably TV.