Manners Shell (bash only)

.bashrc

# Get bash-preexec first:
# curl https://raw.githubusercontent.com/rcaloras/bash-preexec/master/bash-preexec.sh -o ~/.bash-preexec.sh

source ~/.bash-preexec.sh

preexec() {
    python ~/.please.py
}

.please.py

#!/usr/bin/env python
import sys
import random

if 'please' not in raw_input("What's the magic word? ").lower():
    print random.choice([
        "You should be more polite.",
        "Naughty naughty!",
        "Watch your manners!",
        "Your mother would be ashamed.",
        "Tsk tsk!"
        ])
    sys.exit(2)