We'll call her Anne, because that is her name. She was always a bit... odd. She would turn up to every group meeting/event, but never actually do anything. She'd just sort of hover around everyone else, silently lurking, and then she'd suddenly get really arsey with other members 'correcting' them really rudely and abruptly, even though she was 100% wrong. I think we all put it down to her probably being a bit lonely, so no one ever said anything, but we all used to exchange looks. She got odder as time went on.
The first time was during a group Christmas get together, and pretty much all of the members were there. It was very informal, but after about 40 minutes of milling about, group leader called us all over to do a general 'thanks for all your work' chat. Just before he launched into his speech, he took a quick photo of us gathered altogether, then started talking. About 30 seconds in, Anne walked across to him and said 'Can you take the photo again? I don't think anyone could see me in the first one.' We then had to all stand awkwardly doing our best posed faces as he took the photo again - which she then insisted on inspecting to make sure she was front & centre. Gratified, she then said 'You can give your speech now.' Which was a bit weird.
The usual thing was to do the group meeting/event and then go for coffee. One time, the leader of the group had bought me a book as a thank you for some extra work I'd done. Anne asked if she could have a look at it, so I handed it over. After half an hour, she hadn't looked at it, and was getting up to leave. She put MY book in her bag as she said her goodbyes. I said 'Oh, Anne, can I have my book back please?' 'What book?' 'The book you just put in your bag, that X gave me.' 'That's not your book, you said I could have it.' Thankfully the group leader was there and said 'No, Anne, I bought that for Sadeyed' She yanked it out of her bag, slapped it on the table, and hissed at me 'It's not YOUR book.' That was quite awkward.
The next time, I wasn't actually present, but she reduced another group member to tears by launching into an absolute tirade of homophobic abuse when he brought his husband along. It was, by all accounts, absolutely vitriolic. At which point she was asked to leave, and it was later made clear to her that she could not remain a member unless she apologised directly to the man involved. She refused.
About a year later, I was running an event on my own for the first time, when I realised the group of people I was talking to had been joined by someone who looked familiar. At the end of my talk, this woman absolutely buttonholed me, asked endless questions, kept going on and on and on about how this was BRAND NEW INFORMATION to her, she'd never even heard of this hobby, how interesting it all was, was there a group she could join?
Yes. It was Anne.