When it comes to first date etiquette, 17 First Date Etiquette Rules Everyone Should Follow. If you met through online dating, How do you mind your manners when you’re online dating? Does etiquette matter on social media? Anna Post, the great-great-granddaughter of advice guru Emily Post. When communicating with people that you meet through an online dating website, you must have the right etiquette throughout these communications or else you…