Me too. Detentions usually meant you had to tell your parents, or rather, they knew cos you were late home from school.
That was the old days, with proper parents who parented their children.
Just before i'd had enough and quit, it was becoming quite common for angry parents to phone up the school complaining how inconvenient it was for them, to have to pick their little scrote up at a later time.
My response was something along the lines of 'Good, I'm glad it bothers you. Perhaps you'll have a word with him and tell him to behave in a way that doesn't inconvenience you in the future.'
It was a dose of the truth, but not PC enough for our modern headmaster. lol