There is a code, but it's not set in stone that it is followed at all times. Its more like a guideline and it is the same with the Counselor code of Ethics (I'm a T in training too). It's one of those things where you need to use your judgement and weigh the pros and the cons of formally reporting someone.

In this particular case, maybe you can talk about it without using names. You are in no way required to name anyone if you don't want to.

The only time this is not true is in cases of suspected child abuse or neglect, where failure to report by a T, teacher, doctor, etc.. could result in legal action. Otherwise, this is your choice.