"God is the name by which I designate all things which cross my path violently and recklessly, all things which alter my plans and intentions, and change the course of my life, for better or for worse."
-C G Jung
There are multiple reasons why some companies require their employees to wear uniforms. One of them is security. Restaurants obviously do not want non-employees in the kitchen.
Someone wanting to impersonate a BK employee would have to get their hands on a BK uniform shirt and a pair of BK uniform pants.
I know that nobody on the DP board has been conspiring to impersonate a BK employee, but companies today are lawsuit conscious.
Also their costs of supplying uniforms to employees would likely go up if they offered skirts as an alternative to pants.