老師處罰過重

是咁的,我中學果到有個老師平日有時候都會同我開玩笑,有時會fake我話我今日要留堂,有一日,我就同佢挽下,用個玩具手扣扣往佢一隻手,之後佢就話要話比訓導聼,我即刻同佢道歉,係咁say sorry想佢比次機會我,佢就話一定要交比訓導處理,訓導老師知道之後就叫我寫番封道歉信比佢,仲話要記一個缺點,只係小小事就話記一個缺點,我覺得佢過罰得過重,道歉我又寫左,道歉我又一早道左,訓導老師問我點解要玩老師,我就話只係挽下(因為我都唔知後果會咁),可能係老師果日心情唔好,但都唔洗咁下話,如果講挽果個老師都成日fake我話要留當,咁校方係唔係比封警告信,我覺得好無助唔知可以點