This is a common discussion when younger people disrespect older people. Simplest of the argument is that old one are of senior in age, experience, wisdom and level of understanding in the atmosphere. They deserve to be respected equally high. It is also depends on the deeds of the elder. If the elder does or harm anyone younger to him or her. If it is physically harmful or injuries caused to younger one. There are policing is also there . they will look after the matter. There is no reason we should or we should not disrespectful to elders. We can only ignore them. We are to respectful to elders whom we know and familiars to us.