Without an official handicap, you are not able to truly compete in golf, and in every match you play you have brought an element of unfairness to the game. Accurate handicaps provide the only fair basis for competition. Playing without a handicap is a breach of etiquette, especially in light of how easy and inexpensive it is to officially obtain one. Always have the exact amount needed to settle the game. This should be your guide to behavior and temperament on a golf course.
Golf is a game of days, next shots, and handicaps.
You are never out of it until you get mad, become beligerent, start throwing things, in other words, until you give up. Never blame other golfers for your bad play out loud or even quietly to yourself, if you want to play well. Never blame another player for enforcing and championing the rules of golf. Don't explain why your shot was bad, or good, and never yell out or whine after hitting a bad shot. Don't be so competitive that you forget that golf is a game played competitively for enjoyment.