If you are in a channel its kind hard to stay away. But when you are in a huge bay, lake or open ocean, I really see no need for a power boater to pass close to you.

Its nothing but trouble waiting to happen, either on the sailboat side, or the power boat side.

Either way, to go out sailing is to have fun. Not to get mad. If thats the case go back home and save yourself a headache. Definatley not worth in my opinion.