Well using your logic don't you think it's long past due that they ban all guns in the United States? How many innocent people in your country get killed every year by guns? I could be wrong but I would guess a few more than the number killed by jet skis world wide.
Jet skis - I can take them or leave them in Negril. I rented one once and had a good time. They don't bother me at all. And considering most if not all are 4 strokes there really is next to no fumes.