Wizards of the Coast sent Pinkertons to a youtuber's house because he made a video about promotional materials for Magic: The Gathering, which he received early probably due to a clerical error (happens all the time). Wizards is currently trying to cover up and censor any discussion of this, including on subreddits about their products that they control.
This comes not very long after Wizards tried to update an existing license for their Dungeons and Dragons products, which would effectively make any home-brew content published by the community retroactively the property of Wizards. They publicly backed down and claimed the new license was only an internal proposal (it was leaked by an employee), but this was almost certainly fake damage control because the controversy was causing them terrible PR just before the release of the Dungeons and Dragons movie which the community was threatening to boycott.
the youtuber discussing it:
https://www.youtube.com/watch?v=bD9HRueI6Js