Yeah, I know OP doesn't want to hear it, but it's not a good idea to delete all posts en masse like that. By deleting all the threads she started, you screw every member who participated in those threads: you're basically telling them that their time and participation is not respected. Also, all the threads of others that she participated in are now often not going to make a lot of sense. What about all the direct responses to her, people quoting her? It's just not worth it to pacify one pissy person.