I was too scared to misbehave at junior school.
At my convent school one didn't have to do too much to get them "the nuns" in a serious stage of outrage, that could be triggered by a number of issues, not wearing the regulation boater, being seen in the local town without one's gloves...this was the 1960s, although it might just as well have been the 1860s, or worse still seen in the town without one's white gloves, eating chips (very common) because a) the gloves have to be removed b) the chips were wrapped in newspaper and c) eating in the street is beyond the pale.....and you could make that a bit worse by eating chips, without gloves and walking along with a member of the opposite sex 
Other than that any form of dissent was also an anathema such as arguing the case for contraception, reading books that put the catholic church in a bad light, such as those on the Borgias and The Spanish Inquisition. They did like to cover up the dark history of the church. Of course we didn't know then about the sexual abuse scandals then. Colouring hair, wearing mascara, lipstick, tampons, yeah tampons, even married women shouldn't apparently! ......oh God I could go on forever
They were shockingly ridiculous about most things.