Am i overreacting or is my sister being toxic?

My whole family says i'm thinking too deep into it and it's not a problem and everyone thinks it's funny except for me. My 23 year old sister basically made a whole chart on her wall in her room where is is rating people she knows including us as family members. She made paper cutouts of our pictures and put them on the wall, and the higher up she puts you the more she likes you and vice versa basically. Everyone thinks it's a cute and fun idea but i find that incredibly toxic. Like what we have to fight for her approval and do anything she wants just so that we aren't put lower? She was talking to my parents, my dad said something. And she just said "Dad i don't like your tone i'm gonna lower your rating" It's like she's trying to train us like pets or something.

I may be overthinking it but i just told her to put me at the very bottom of the list and leave me the fuck alone