How can I protect myself from power boats when I'm in a kayak?

I frequently kayak in waterways filled with everything form large ships to small boats and jet skis. I know the obvious: kayak whistle, lights at night, avoid busy channels when possible, etc. What I’m wondering is, what is the best way to take aggressive defensive measures when I’m about to be mowed down by a mullet headed jackass with a beer coozy in one hand, fishing pole in the other and his knee on the helm of a motor boat, who is aimed right at me but isn’t looking or listening? How can I even the odds and create a visible, potentially destructive deterrent, so those idiots will avoid me?

Why do people refer boats and ships as girls?

When and why have people called ships and boats female?

How many ships did German U-boats sink in total?

Can someone give me an estimate on how many ships (merchant, warships, etc) did the U-boats of Germany in ww2 sink?

How many marine going vessels, ships or boats have been lost at sea?

Since the first attempts to navigate the "Seven Seas"; how many ships, boats or vessles have been lost or wrecked at sea all around the world ?

I want to work on boats or tourist Tjarippin?

I want to work on boats or tourist Tjarippin States and the European Union experience, qualifications, I am Egyptian
Certificates:-

1-Personal Safety and Social.
2- International Code for the Security of Ships and Port Facilities.
3- Fire Prevention And Fire Fighting.
4- Medical Emergency Basic Training (Elementary First Aid).
5- Personal Survival Techniques and Search and Rescue.
6- International Medical Certificate for Seaman.
7- International Certificate of Vaccination against Yellow.