The proper etiquette is for all cyclists not to endanger the life of other cyclists by passing to close or doing other bird-brained things. It has been said a hundred times on this forum that there are thoughtless narcissistic jerks everywhere. Some are in cars, some are pedestrians, and yes, some are on bikes. The real skill involves being able to look at yourself and identify what type of action would make you a jerk, AND then to have the courage and desire to change.