Wasting time instead of studying Torah (Bitul Torah) is a big no no in Religious Judaism, and by stopping the lecture, the inspectors did just that. I am sure the Orthodox community understands why this was done, but this gives them a good battle cry against the inspectors. The reason that was necessary is that there are many "virtual students" in Yeshivas. The students register in order to get away from army service, but are not interested in studying, so they spend their time outside. As soon as inspectors show up, all the virtual students get a call on their cell phones to come and be counted. Unfortunately for the inspectors, they will have to work harder. Either find out the schedule and show up towards the end of the lecture (which all the students are expected to attend and which makes counting easy), or come at any time and just go around from room to room and count the students.
Gunmen in Egypt kill guard outside Niger embassy (Reuters)