I was out last night with my family and in-laws - saw one PWC and 2 sailboats without lights after dark. The couple on the PWC (clearly adults - I saw them earlier) were sitting still (wearing dark clothing and jackets) obviously watching me to see if I saw them. The 2 sailboats were heading home from a race and were atleast out of the main channel and near coves. I have good eyes and spotted them early enough, but my wife and in-laws couldn't see them until they were within 100 yards. There were probably 12-15 other boats within eyesight at the time. What are these people thinking? Kinda ticks me off - risking my and my family's life along with theirs.