Should there be multiple Valedictorians, also know as Dux and Major de promotion?

also know as Dux and Major de promotion?

High schools are graduating bigger & bigger groups of valedictorians. South Medford, Ore., for example, has 21.

Valedictorian is an academic title conferred upon the student who delivers the closing or farewell statement at a graduation ceremony (called a valedictory). The chosen valedictorian is usually the student with the highest ranking among his or her graduating class.

Should the concept of Valedictorian and Salutorians be limited to the top achievers as a reward for their efforts or should all of the the top students ... such as making the Deans list, a 4.0 average, all A's, etc ... be so honored?