I've heard that Anne McCaffrey is very protective of her world, but wouldn't you be too if you put that much work into it like she did?
Anne became protective after:

- Out of nowhere and without any prior notice MUDs and other interactive games openly using "her" books characters and plot line were asking for paid subscriptions. Explicitly leveraging on the Pern brand to sell more.

This pissed her off a lot and had her attorneys sue them and close a lot of those sites / games.

- Out of nowhere and without any notice authors drawing Pern's worlds landscapes, characters and dragons and selling them for profit and citing the Pern names.

This elicited a widespread take of action and many who marginally "touched" the argoment including Dreslough went into the storm despite they were not the source / cause of her sueing.