It’s one of the first things I would expect from a site like this. I know that J.K. Rowlings views are very controversial to put it mildly, but:
- The fandom/books are not the author
- Harry Potter will become a part of the Fediverse at some point anyways - better to support it early on and shape its developing rather than having a company build a H.P. social network on top of the fediverse, which will be to our disadvantage
- In terms of potential users, this could be huge for the threadiverse
- We are in the Fediverse: defederation is always a possibility
There is !harrypotter@literature.cafe if you want to join. There is some activity at the moment, but not enough to go for a dedicated instance.
Also, as the other comments have shown, the bigotry of the author does not help.