could it be that, the so called pro fishermen. has such an ego, that they draw the idea up in their mind. that a boat that gets close to them, is getting their gps location. it is very rare for a boat, with a stranger in it to get close enough, for you to cast and hit their boat with a lure. and I don't believe any ones sight is good enough for them to see if a fisherman a casting distance away is touching a gps key on their fishing unit. I think it's an ego thing, they say to themself, I'm so good that boat is getting my gps location. I say let the spectators watch them make every cast, it will keep them honest. they want be able to hide fish in baskets to win with. like the guys on cumberland did back a couple months ago.