IIRC you have to have a license to work with certain types of data, that person/those people need to lose grades to the point they have no controlling decision with respect to personal data. It shouldn't be up to their colleagues whether they get held responsible.
I work in a craft studio and face a large fine - so I'm told - if I reveal personal data, or make that possible ... because perish the thought someone could learn you painted a piece of pottery, but reveal personal health information against patient wishes and nothing happens?