Potential Fireworks between "Buyer and Seller`s".

It`s the 4th of July and it`s a great day to celebrate our independence.
People are enjoying themselves swimming,BBQ`ing,relaxing and maybe some drinking!
We received a call from a Realtor who wants showing instructions for our listing.
The agent tells us their client is only in town for two days.
We call our client, confirm the listing appointment for the afternoon and go about our business of enjoying a day off.

Three hours later I receive a call from our client,the potential buyers are standing outside their house, without the Realtor in tow!
I ask to speak to the buyers and find out where the agent is.
The clients seem confused.
They`ve been viewing homes for the past two hours without an agent!
They don`t quite understand all the fuss.
The Conversation is as follows:

Out of town`ers: Our agent was too busy to join us. They gave us Lock Box combos and told us to knock on home where the owners are home.
Me: You don`t see anything wrong with this?
Out of Town`ers: Why no! We`re in town for a few more days and we`re just looking.
Me: The owners were instructed never to open a door without a Realtor accompanying the client.
Out of Town`ers: It`s no Big Deal, we`ll leave.

I guess to these potential buyers it`s not such a Big Deal.

Tomorrow, I`ll be calling the Broker in charge of the agent who gave these nice folks showing instructions to find out what the heck is going on!