When I was in residential. We would often go out to eat so that the people with ED's would have to face their anxiety. It was based in CBT. Afterwards if they wanted to go to the restroom a Residential Councillor of the same sex would go into the washroom with them. This also happened at the hospital. It was the way they prevented purging. It was a very respected hospital. So I don't find it weird at all.
Thats just my take though. I realize it is different than everyone elses.