Very strongly disagree. Bulimia can wreck your teeth and esophagus, or can cause serious injury depending on your chosen purge method. And both can cause nutrient deficiencies if you undereat so much. Not to mention it can completely fuck over your hormone cycles, as those are fat based (though that's much harder to do, as body-fat is functionally the same as dietary fat, so you'd have to be severely undereating or at a low body fat percentage).
It's sad that she feels the need to go to such an extreme, and /u/Fursifer is right to be worried. Please push for her to get help! Weight loss doesn't have to be unsafe, but she's making poor decisions in her desperation and it will come back to hurt her in the long run.
I also kind of agree with you about some of the judging in this subreddit. There's a difference between Ragen posting another meme to fleece her flock and some posts which look more like a cry for help than an attack. But there are a lot of edge cases which can be hard to tell. I think just a little less judgement and a little more compassion would go over well