Our course is on a public lake. We were bothered by one fishman all summer. We ski 6am to 730am. There is no one out there but 2 ski boats and 4 skiers. At 630am these guys start trolling down 2,4,6 then go down the boat guides when we spun at the end. I am driving, I see these guys and don't know what to. My skibud yells at me to hit them, not going to kill anyone, so I go around the outside of the turn balls. My skier had words with them as he passed. Can't talk to these Wally's, we go home, wipe the boat and go to work.