It's not selective, it's discretionary.
How do you know they're loaded? If they are unloaded, then the employees are modeling the merchandise. Is the officer supposed to assume that they are loaded, detain each employee, and then proceed to verify that a crime has not been committed?
i agree with the first part... but the last part wont ever happen unless they all get on there motorcycles and start running up and down the road...its all about the enviroment...