It's a never ending battle keeping this department to follow procedure and I have to constantly reinforce the training they receive.
Just a thought... I really don't think that LEGITIMATE customers ever have issues with waiting a reasonable amount time for a staff member to let them in. In my store we try to make it a little more enjoyable than normal because we use an old cowbell to signal for customer assistance @ the fitting rooms. It also forces the clothing associates to be attentive to the sales floor which helps in two ways, first... they are less likely to be in the backstock stealing from their employer and second... it gives them a time for customer service that DOESN'T seem overly aggressive to the customer.