Chapter And Verse

The best defense students have against being forced to learn is to try to use halacha against their teachers. For example, there is a dispute whether all parts of Torah may be learned on erev Tishah B’Av afternoon or only topics relevant to Tishah B’Av and mourning. I remember in camp the stringent minhag was adopted by many campers. If the group one was in was learning their regular studies on that afternoon, the student would say “Rebbe, it’s my minhag not to learn this now!” The Rebbe would counter, “How long have you had this minhag for?” The student would respond, “I just adopted it.”
As a bachur, I tried to convince my mashgiach that he wasn’t allowed to take attendance on Shabbos. Typically, during the week, there was a list with the names of all the bachurim. If he was present at seder, a dot was placed next to his name. On Shabbos, the bachurim who were present at afternoon seder (on long Shabbosim) had their names covered with a bobby pin. I argued that this was forbidden. Since the normal way to take attendance was with writing, one should not be allowed to take attendance with a bobby pin, because he may inadvertently come to write. The mashgiach considered the point and consequently sent the query to a renowned posek. The posek concurred with the logic in general, but said that the yeshiva can be lenient for a mitzvah purpose. Since attendance at seder improves when there is a record, this was deemed a mitzvah purpose.