In customer service, it's important to make sure that you treat all customers with respect... you just never know who you are dealing with.
Case in point. A friend of mine is a high ranking IT person at a school district. He has a personal Nextel phone which was going to be replaced by one that would be provided by the school district since they were in the negotiation process for a district cell phone plan. So he calls Nextel and asks them to disconnect his personal phone and references the new contract that will be replacing it. The service rep wants to charge him a $200 disconnect fee. He tries to explain the situation yet they refused to budge bordering on rudeness.
To make a long story short, he was so irritated that the school district will now be negotiating with Verizon. If they do drop Nextel for Verizon the $200 disconnect fee will cost them thousands of dollars.