Final answer:
The ethical implications of marketers gathering and selling customer data are up for debate. It is important to consider both the benefits and potential ethical concerns when discussing this topic.
Step-by-step explanation:
The question is asking whether it is ethical for marketers to gather massive amounts of data about everything a customer does and sell advertising using this information. This topic falls under the subject of Social Studies, specifically in the area of Ethics.
When it comes to ethics, opinions may vary. Some people argue that gathering and selling massive amounts of customer data without their consent is a violation of privacy and unethical. Others argue that as long as the data collection is done with the customer's knowledge and consent, it is ethical and can help deliver targeted and relevant advertising.
In conclusion, the ethical implications of marketers gathering and selling customer data are up for debate. It is important to consider both the benefits and potential ethical concerns when discussing this topic.