Human languages typically portray grammatical distinctions to the listener between honorific and colloquial language. These distinctions may be grammatically encoded by a regular system of verb and noun affixes. In Japan for example, language is used to show respect between children and parents or between husband and wife.
As a sign of respect in almost any form of the military is a salute. A salute is used by enlistees to show respect to officers (and vice-versa; to not return a salute to a subordinate is considered offensive) and by officers to those of higher rank. The 21-gun salute is done within the military for funerals of military members and for high-ranking civilians such as the President.
Some organized crime syndicates, both real and fictional, revolve heavily around the theory of respect. Hired men and those lower in the rank of the family are obligated to show "respect" to the mafioso.
There are many cases in which perceived disrespect has led to murder and other violence.