I once had a massive argument with someone on wattpad just because I pointed out a mistake in their book.
They went full-scale and attacked me, but I had so much fun arguing with them even though it was clear they hated my guts.
They are halehells and they are quite famous, well, they have a lot of followers..., and they are a little bitch, getting everyone to gang up on me by posting the argument in a chapter on one of their books. They do it to everyone they don't like. I'd seen them do it before.
