Emma sells hardware and software to over 100,000 customers per year. She has 10 years experience. As part of the billing process she keeps information on customers. She buys and uses a data mining tool to derive useful information about her clients information such as zip codes, credit card numbers, ID numbers etc. Most of this information identifies groups and not individuals. She can then use the information to market her wares more efficiently.

Is this ethical since customers did not give her the information for this purpose? Discuss! (Not less than 500 words)