Firing warning shots legal or not?
My jet ski deterrent method was totally legal. I had a 340 HP Jet boat on the Colorado River for a few years. The Berkeley Jet Drive had a diverter, which trims the boat, and makes a huge 200'' rooster tail when trimmed all the way up. When jet skiers would come up behind me too close, I "accidentaly" trimmed the drive all the way up, which delivered a 340 HP fire hose blast that would peel the skin off you forehead!