Do your squats.
I don’t know who you are. I don’t know what you want. If you are looking to do curls, I can tell you I don’t have the need. But what I do have are a very particular set of legs; legs I have acquired from working them out in the gym. Legs that make me a nightmare for people like you. If you stop curling in my squat rack now, that’ll be the end of it. I will not look for you, I will not pursue you. But if you don’t, I will look for you, I will find you, and I will squat you.
This is most likely fake as it’s popped up on 4chan, reddit and bb.com, but it still drives the point home.