People noticed that in her old Twitter profile picture, the wall behind her had some heavy black mold. This led some people to joke how the mold controlled her brain and caused her personality change, making her transphobic
I remember in the final Harry Potter book, after Voldemort is defeated Peeves (the ghost thing) sings a song about how Voldy has "gone moldy." Yet another thing he and Joanne have in common these days.