Students on school trip see live sex show

Sex shows are something that a number of people like to see, but an equal number of people really don't appreciate, don't consider them morally defensible, and would like their children to stay away from. When you add this to the fact that you consider school a place to bring about a good education, to inculcate morals, then it would be shocking to hear that a school trip involved students being taken to a live sex show.
And this was promoted by the teachers who went along with the trip, and worst of all, the parents did not know about this until they saw it on Facebook (link to article):

A particular snap shows the students aged 16 to 18, and the two teachers sitting around a table littered with beer bottles outside a Bangkok bar.
Now, it has also come to knowledge that later the pupils headed to the city's red light area, whose streets are lined with bars offering sex shows.
Seemingly, the development has created a buzz in the school.
"It is the talk of the school. The teachers, a man and a woman, are fighting for their careers over this because the youngsters were supposed to be in their care," News of the World quoted a source as saying.