Simply unbelievable. In today's economy no store can afford to operate like this. It was rude and unprofessional. Not only that but if a less then honest person walked in it sounds like they would have had ample time to rob the place blind.
On a few occasions I have walked into a small business with door chime and no one around, I like to call out hello until someone acknowledges me. When they come out to say can I help you, if I am browsing, I say I just wanted to let you know I was here and make sure you are ok.
However what you described that ploy would have had no impact either. Wow, just wow. Well I guess they must be one of the few places doing well enough that they don't need the business. Good for them, enough treatment like that to potential customers and they won't have any business.