Well, it is their business and they can make whatever rule they like. What if it had urged customers to not bring their homosexuality into Starbucks?
I agree that private corporations can make whatever rules they wish.
But Starbucks is deferring to one authority over another. I’m seriously asking what constitutes “authorized” law enforcement, by what authority, and whether that authority has any superiority in law to the Constitution itself.
I’m making the point that Starbucks is deferring to a lesser right of law enforcement than the greater right of the citizen.