Which action would generally not be permissible if a user opts out of data collection?

When a user opts out of data collection, one of the primary rights they exercise is to prevent their data from being used for specific purposes, such as targeted advertising. Targeted advertising relies on the collection and analysis of user data to deliver personalized advertisements based on individual preferences and behaviors. If a user has explicitly opted out, engaging in targeted advertising would violate their privacy preferences and undermine the trust they place in how their data is handled.

In contrast, sending promotional emails, participation in surveys, and accessing previously collected data can still occur under certain conditions, depending on legal frameworks and the specific permissions granted by the user at the time of data collection. For example, if users have consented to receive emails or participate in surveys before opting out, those actions might continue unless the user specifies otherwise. Accessing previously collected data may also be permissible for other reasons that do not breach the opt-out decision regarding active data collection.