I really loved "How to Be Polite."
But the bit about hair touching (which, as the article rightly says, you should never, ever do) reminded me of something that happened a long time ago.
I had waist length wavy hair for many years, which people would constantly touch. I was waiting in a lengthy line for the ladies' room at the Alley Theatre once when a woman behind me just started playing with my braid. I was young, and tried to be polite about it (also sort of thought she was clumsily flirting with me), and so fell into conversation with her. We exchanged phone numbers and when she called & asked me to coffee, I accepted.
In the end it turned out that she wasn't so much asking me out as she was trying to get me to join a sort of cult. True story.
In retrospect, her behavior was classic boundary testing. She was being predatorial. She was violating my boundaries to see what would happen, and what happened was that I gave her my phone number.
It's amazing I didn't end up in that cult.