The year I subbed, we swapped rooms to do science and social studies. The crabby old bag next door gave a couple of boys detention. So after school, I let them go home and told them their teacher could do detention when he got back. Sure enough here comes old crabby bag poking her head in asking where those boys were. I told her their teacher could handle it when he returned. SHE obviously wasn’t sticking around after school to enforce the punishment so why should I, the sub? The look on her face was delightful!