NOT the first instance, I saw a ten year-old operating a Jet-Ski just yesterday.
About ten years ago, I posted here of another Jet-Skier (maybe 11 years-old).
About the same time, a 15 year-old Jet-Skier from MA was found dead just a quarter-mile from here (in sight, had I been looking). It was in the vicinity of heavy steel I-beams welded together to provide ice breaking for community docks. (Not far from the Hackercraft Hit-and-Run--also in sight).
Earlier I noticed another Jet-Skiing ADULT with a diapered baby in his lap. Later, the MPs cautioned that they shouldn't be operating after sunset. An hour later--continuing in violation--i saw the same Jet-Ski being towed away by the MP.
When I'd notified the MPs about a loose yellow canoe, I was surprised when the responding MP patrol boat called me!
Minutes later, he advised that he couldn’t locate it, and where had I last seen it. The MP boat did a long tour of Winter Harbor with no luck. He called back again and thanked me for trying. I informed him that since being taken over by the NH State Police, my frequent calls (noise and speed mostly--with an MP patrol boat within easy sight) weren't welcome, and was advised by the dispatcher, "Not to call back again."