I don't really have any horror stories, but I will say that reflecting back on the T I had for an ED when I had anorexia, she said things that were actually very triggering sometimes. If it was meant to help me make progress it was never explained and didn't work. She said during multiple sessions "you must be at your goal weight or close by now, right?" I am sure she didn't mean it to be triggering but all I heard was "you look fat enough to be at a healthy weight" when I still had a BMI that was underweight or qualified me for the anorexia dx, so I think that made it harder to recover. She also said things like "your mom is so tiny". I think she just wanted to help me with my perception or something? It was all triggering since I needed to talk about anything but weight and my ED honestly. Just too much talking about weight in triggering ways for me, made me feel worse and I left farther from recovery than when I started I think. At least she was professional/not creepy like many of these stories.