Jetskiers are probably oblivious to peoples opinion of them, they misinterpreted peoples annoyance as envy or jealously. So what is needed is a more forthright way for people to express their opinion.
That is why I am advocating at all boat owner should be armed with shot guns
If you were shot at each time you appeared somewhere or other you would soon get the idea that your presence was not welcome and the nice thing about a shot gun is that, other than at close quarters, it is not lethal so the jetskier gets time to learn
. I suppose that a fringe benefit it that this could be new sport ‘jet ski hunting’ could go Olympic, who knows.