We do not know whom you have in ignore. No one is going to stop just quoting people entirely in order to prevent you from having to deal with seeing something you don't want to see. This is a forum. These things happen. Either deal with it or get out.
MacMadame is perfectly allowed to say whatever she wants to say on the topic, even if I do agree that it can be a little irritating for someone to come talk about something they don't like with people who obviously do. But yelling at people for quoting someone on a public forum where people quote each other all the time because it means you have to see the quotes is totally inane. I mean, really. Just because you start a thread does not mean you can dictate what people talk about or whom they quote (or when spoilers are expected). Forum rules don't change just because you started a thread.
I've never watched The Biggest Loser, but I have read multiple articles about her and several of Jillian Michael's books. The Biggest Loser is, of course, a very special, specific circumstance where people are pushed to lose a lot of weight in a short period of time. The articles and books I have read with her - all of which, of course, are in the USA, or I would pull them out for quotes, sorry - are all about a full lifestyle change, about losing weight slowly and organically but still pushing yourself. "Master Your Metabolism" is an absolutely fantastically interesting book that goes through every single hormone in your body and how it is a part of your metabolism and all these "diet foods" and crap screw those hormones up and play tricks on them.
I have a lot of respect for Jillian Michaels based on this book and her honesty and integrity in the articles/books I have about/by her. But like I said, I haven't watched the show.