Sometimes a little common sense needs to come into play. If the power boat is not "underway" and is not altering his coarse, while the sailboat is in racing mode tacking and jibbing (or whatever they do) and overtaking the the powerboat, well.........
if he sailed behind you perhaps there would have been no boatrage.....remember sail boats generally move slower and sometimes it takes them a bit longer to get in touch with their feelings etc.

"can't we all just get along"
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"Hunting is the only sport that I know of, in which one of the participants doesn't know that he is in the game." John Madden