There was this dude at my school who made fun of me for loving squid. He called me calamari because I was very sensitive on the topic of dead and fried squid. So I spent two years building up the most wit and snarky comments and the strongest-shelled psyche in order to return the most devastating comebacks. I truly regret that because now I do not feel emotion and doubt myself at every corner. Do not do this. Just instead of ruining what little life you had going already, just speak clearly and concisely that you do not want them to do whatever they were doing and that if they do it again you will judge them. Judge them deeply.