Only data that is required for the specific purpose in question may be processed. Therefore, this principle must be strictly applied especially when collecting data.
The more data you store about people, the greater the risk that the people concerned may suffer a disadvantage as a result. Whenever you store data, you have to put yourself in the position of the people affected and consider whether you want someone else to store such data about you. Profiles about people can be created quickly, especially from their communication and surfing behavior, and these profiles may be correct, but they may also be incorrect.
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