Manners are a sensitive awareness of the feelings of others. If you have that awareness, you have good manners, no matter what fork you use. - Emily Post
In our present society we are now seeing a lot of people with bad manners and it is hard to judge them on where they got that attitude. If it is outside or on their own home. We can say that may be 80% were imitation from their friends most specifically if their parents don’t care that much on the kind of people their kids associate with them and if they are always busy with their work and always away from home.
It is a true that parents want the best for their kids, and they don’t generally set their kids up for failure on purpose. Though, it is certainly possible that parents can unknowingly encourage bad manners. This can happen from the daily behaviors of the parents at home, they way the parents interact with other people outside the home.
Manners are really important. The impression we may have will leave a plant in every person we come in contact with. And if our manners are poor, this will become part of our social reputation.
Etiquette is a code of behavior that when used opens more windows of opportunity to success in all walks of life.