Perhaps it was a sort of therapy for her. I don't really consider it rebellious to sit at a meeting and do this sort of thing because the only person that feels any suffering is the apostate having to sit through this boring stuff. It wouldn't phase me in the least bit to do this if not for having to dress up in a stuffy boring suit and sit through the talk.
Was it effective in helping people get out of the Watchtower? I can't imagine how. Was she hurt by the Watchtower and do we have a unique bond with her? I think most of us do. I say cut her some slack.