A legal question about employment?

I work for a Hotel in the housekeeping dept. This hotel has a 100% refund policy. This means that any guest that stays @ this hotel, is given a 100% refund on the cost of their room rental if they are dissatisfied for ANY reason. While there are a lot of HONEST people out there, unfortunately there are some who take advantage of this. Once they rent their hotel room they will then contact the front desk with some type of complaint. (Some are legitimate, others are not) This guest is then given 100% refunded the total price they paid for the room. When these complaints come in, most are never verified. The general mgr of this hotel has decided if a guest makes a complaint and the guest is refunded their money, the housekeeper who was assigned to service that particular room will receive a disciplinary write up and or a payroll deduction. The general mgr. has also started posting a copy of the hotel guests' billing statement on the wall of the employee break room. This posted billing statement contains the name of the hotel guest, their home address, the price paid for the hotel room and the guests' confirmation number. The general mgr. then writes on this statement the complaint given by the guest, and the name of the housekeeper assigned that particular room. When these statements are posted, the employee to whom it refers to is not notified there was a problem before this statement is displayed and yet all other employees see it. Isn't this a confidential matter for both the employee affected and the guest that made the complaint? Since the employee is given a disciplinary written warning that must be signed, and placed in their employment file, wouldn't that be considered confidential?