The company I work for is setup to handle things almost like Boner stated. If you are connected and someone else tries to dialup using the same user/pass then they are simply given a 691 Authentication error. A company that we bought out however allowed as many people to use the same user/pass that you wanted but you had a seperate charge for each concurrent usage.
Just start telling him about the "Joys" of AOL how its cheap and easy and Even comes with its own nifty browser
