The first thing to note is that the people in the photograph are not the minors referred to in the original post.
Section 4 (3) of the Personal Data Protection Act grants mass media an exemption:
This Act shall not apply to an individual or a juristic person who uses or discloses Personal Data that is collected only for the activities of mass media, fine arts, or literature, which are only in accordance with professional ethics or for public interest.
The question of whether or not the photo is a matter of public interest is a matter for Thai PBS, who are a Thai government news organisation.
As Thai PBS are a government news organisation we acknowledge that they have impeccable legal, moral and journalistic standards and to say otherwise would be defamatory.