All information will be treated in confidence
Unfortunately, in this day and age, that's not really a promise you are able to keep though is it?
I know someone who is going to a counselor to deal with some gnarly family history, and they tell me that they are constantly having to be careful what they say because she believes the counselor will report her based on some of the things she thinks about (note - thinks about, not actually doing anything).
When you can't trust a medical relationship to be confidential these days, and journalists appear to be fair game for snooping on, then we really have entered the realms of self-censorship and thought crime (not that there was any real doubt I suppose).
Just my 2p.