After I've had to move for 3 people, I'm done. I am not their doormat. After letting the third person by in a walk, I switch to 'you will respect me' mode, and I will mow you down. Nope, I'm not 6' +. Just 5' 10". But I feel like a wall. And yes, I am READY to punch your lights out if you try to go violent on me. The worst ones are the ones who look right at you and still just move as a wall of 4 or 5 people. Fine, elbows out, fists ready, and I'm busting through.
I give 3, then I demand the same in return.