Jet skis are one of the worse inventions ever IMHO. They're noisy; mostly driven by people who haven't a clue about marine rules and safety; they invade privacy and they are dangerous. When I was cruising and anchored out in a quite cove it really thrilled me to have them go by and then do about six circles around me checking us out. Wake, what wake. Noise what noise.
Luckily I haven't heard of too many bad accidents. I did see one try to splash some people on a dock (not here in Belize)and not really knowing what he was doing he slid into the concrete piling and about totaled the jet ski. Sometimes there is justice. Their appearance here on the Island started with only a few but this year there seems to be many more.