Thats what is done in the world of sales daily. My partner is a salesmen. His job is to steal costumers everyday! In business you take a consumer and look at their need, if you can meet that need better then the person currently offering the service then a person in a sales position won't give a second thought to "Gee that guy down at At&t is going to miss the commision on this cellphone here" They don't care.
Just because our business is one of a more personal one on one nature doesn't mean we are immune to the same ideal.