I've never seen two strangers playing rock-paper-scissors to settle an argument.
Why would my character play this game with a door guard in order to let him open a door for me which he's supposed to guard? If I was guarding a door and someone asked me to let him in, I sure wouldn't start a game of RPS with him.
I am confident that Rock-Paper-Scissors represents a symbolic battle of will and force of personality between two characters. There is no actual game of Rock-Paper-Scissors happening.
