AMA Ethics Dilemma

John Smith has a difficult dilemma when deciding whether it is ethical to sell the names of surveyed people to a car salesman. The AMA Statement of Ethics basically says that it wants its business owners to conduct themselves in good ways and follow norms established by society and law. The best statement that applies to John Smith's situation is that its an ethical norm to foster trust in the marketing system. This is where the situation gets tricky because depending on some circumstances the situation could be either ethical or unethical to sell the names of potential buyers. It's unethical if the surveying company has bylaws that require them to keep surveyors information private or if state laws require personal information to be kept private. In this case the situation would be unethical because selling these names would be illegal. However, I believe if these parts of the situation are not in place than selling these names is ethical because the people surveyed here are obviously in need of a car. There is no harm done here if a brief phone call or email is sent to them by the car salesman. However, if their information gets into the wrong hands then it becomes unethical. It's a hard decision to make because he needs income to keep employees from being layed off and they support their families. What would you do in this situation?