I agree with what others have already said. Telling people "She'll tell you when she gets back" is very reasonable.

Hate to say it, but I am going to..... youths groups, social groups, bands can be notorious for being very intrusive. Maybe it's the age or the climate but your privacy is not your own even when you should be entitled to it. They will say and do things because they 'care' and maybe they do. But many will not have had experience in the mental health arena and may end up saying things out of sheer ignorance. Grrr.

For your daughters sake please urge her to be wise in who she talks to. Maybe be not to say much at all. When well meaning people may just turn up at the hospital without her consent. This can be easily fixed by asking the staff not to allow visitors in general and she can give the staff name of family or friends that she would like to see. Even then there may be days when no visitors are too much.

If there is a youth leader maybe they could be asked to get a message to the "youth" to please respect her privacy.

It isn't everybody's business at all. Protect yourself and your daughter. Turn off the phones and listen to what the doctors are saying. Take Care.