I had the same problem while fishing a bass tournament on Lake Greenwood. We were running a bank and all of a sudden here comes a guy on a PWC. He got up near shore where we were headed and started playing. Well that was not a wise decision. Wy fishing partner goes about 260 lbs. and is not fat. He is as solid as an oak tree. He reached down and grabbed a rod with a 3/4 oz. spinnerbait and nailed the guy. He turned and started cussing out my partner and threatening him until he saw who was yelling at. Well my partner told him to come over and get him some. Needless to say the guy wised up and made a hasty retreat and we never saw him again. We are easy going people who do play well with others but this guy left us no choice but to defend our territory.
To make life enjoyable, you must have crappie days.