The power is in the uniform and the attitude. Mall Cops have the power to make would-be criminals very nervous. They have the power to threaten to call your parents or (and this may be more or less serious depending on your parents) the police. Mall Security Officials are going to need to exercise that power to control angry or disorderly customers, mediate arguments, apprehend suspected shoplifters, and generally clean house (or mall). The challenge is wielding this power with the gentleness of a kitten in order to assist lost children and old ladies.