It has an emergency vehicle light bar on top and those police-style hub caps so I'm safely assuming it is their security guards trying to pretend they're real cops.

Technically you could use that push bar to move a disabled vehicle... if you don't mind causing expensive damage to the bodywork of the other car. This kind of bar is for when you want to use your vehicle as a weapon to pit or ram other vehicles and keep your own vehicle in functioning order. As security guards they'll never do that.