Of course you and your friends weren't wrong for goofing around... it's all your professor's fault. Why don't you blame your parents while your at it... or blame the department chairperson... I'm sure it was their fault your professor was upset with you goofing around in class...
And by "getting back at her", you'll be digging yourself a deeper hole...
Just let it go. You misbehaved. You were caught. Let it go, and don't do it again. Start acting like an adult and take responsibility for your actions.
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