This is an interesting question. First off, I have to say that any kind of generalizing is totally wrong...you could go to any single place on Earth and either have a great time or a horrible...
In the war, the archers would shoot the advancing enemy. The enemy were threatening to cut off the archers' middle fingers if they lost. When the archers' army won, the archers stuck their finger up...
Parents should be teaching their children what is rude and what is not. They are suppose to be the role models. If a child grows up without parents then they must learn from those around them....