Let them post and point out that they are possibly damaging the population by taking the breeders (unless of coure they have found a secret honey-hole that has nothing but these large breeding monsters.) I know some guys who go after these beasts and while I do disagree with their taking the largest fish (and most prolific breeders) from the population I commend them for eating the entire fish. If it is being speared just for a trophy status then that is wrong on so many counts (I feel the same about game animals such as elk, deer, moose, sheep, and all the others that "horn" collectors go after.) Sometimes if you enter into an intelligent conversation with these guys and point out the breeding habits of fish species they will listen, and sometimes they may even become more selective in their targeting. Just telling them that it is wrong usually accomplishes little more than making them more defensive of their actions.