Even if no personally identifiable information is revealed about individuals, collecting data from data leaks can still raise ethical and legal concerns.
This is because such data is often sensitive information about a specific group of people. Using this data without their knowledge or consent can lead to potential harm, especially if it is used to inform a predictive model that could potentially be used to target this group of people for marketing or other purposes. It is important to consider the ethical implications of any data collection and use, and to ensure that individuals' privacy and consent are respected.
Additionally, the laws and regulations surrounding the use of data obtained without consent vary by country. In the European Union, the General Data Protection Regulation (GDPR) requires explicit consent for the processing of personal data. In the United States, there are various federal and state laws that govern the use of personal data, such as the California Consumer Privacy Act (CCPA) and the Health Insurance Portability and Accountability Act (HIPAA). Other countries such as Canada, Australia, and Japan also have their own privacy laws. It is important to research and understand the laws and regulations in your jurisdiction before collecting and using any data.
While most large companies have policies in place to ensure ethical data use, it's not always the case that they follow them. Some companies may prioritize profits over ethics and may be willing to take risks when it comes to data collection. However, there are consequences for companies that violate data privacy laws, including fines and damage to their reputation. It's important for companies to prioritize ethical data use and for individuals to hold them accountable when they don't.
It is always best to obtain data through ethical means such as opt-in surveys or public data sources. It's also important to be transparent about your use of the data and to obtain informed consent from individuals if possible.
I hope that provides some more insight to your question!