not to be controversial but i think “campaign to convince everyone in our queer/chronically online circle to not touch anything remotely related to harry potter ever forever, not even fan content”
is way less effective at actually accomplishing anything than “convince a broad coalition of people, including cishet normies who know nothing about online discourse, to boycott the harry potter show for the first two weeks” would be
but what do i know
Or like, getting Barnes & Noble to stop selling Harry Potter merch would be a much more devastating cut than bullying Drarry shippers
It quite goes back to this space actually being more or less an echo chamber (like other social media spaces, mind). We just propagate to ourselves about boycotting HP and all that, even going as far to harrass HP fanfic writers or fanartists for being complicit (and tbh that's another whole can of worms about Death of the Author and cultural influence and all that).
But even as we bitch and whine herr about Rowling's toxic transphobia and her influence, the average person irl wouldn't be fully aware of why HP is problematic, and/or that Rowling is a terf, or how that influence affects trans communities in the UK and worldwide. HP is still unfortunately widely recommended in libraries and it's not like we are the only group who read her works. There's a reason the HP got mass appeal and why it's still a prevalent cultural phenomena, whether we like it or not. The other reason why the influence of Neil Gaiman and Good Omens vanished overnight is simply because his works and himself were catered to this demographic on Tumblr, and he doesn't have wide appeal beyond this space. So once Tumblr renounced him, he has nothing. Rowling might lose her fans on Tumblr, but this space isn't reflective of wider sentiments