What is the fine-grained topic of the following text: It is almost like adding a person to the blacklist, blocking them, but it goes further in that you undo all the matches you've done with them, and you see no other mentions of this person, and they don't appear in the LikeMe ratings, possible matches suggestions, in the People Near Me map, and so on. Only return the topic.
Comprehensive user blocking on a social networking platform