If you said 'crap', you broke the rules. If you played with cards, expressing your card trick side, you broke the rules.
Oh my Goddess, I give up, I just plain do. I, personally, express myself through what I wear, how I act, and what I do, and that was quite limited during school times. I couldn't express my Faith, but, ironically, Christians could. I couldn't express my art talent, in the Tarot Deck field, because it wasn't allowed. But, ironically, playing poker was fine?
And, when uniforms came around, we lost a good deal of our 'cliques'. The 'goths' couldn't be 'goths'. The preps couldn't be 'preps'. Sure, that's a good thing, but it just threw everybody into the same boat: We're all the same. We all dress alike.
Honestly, at that point, I wouldn't have been surprised if we started walking in single file lines and started hailing our principal. That's how strict thing started to get. And, until you go/have gone to my school, you have no clue how bad things were, how limited we were in speech, deed, and overall expression. They wanted us not to be different, but just like everyone else.