I still might hit him with a rock. There would be plenty of fish for you and the birds of we (people) hadn't done nearly everything we could have to pollute the rivers of this continent over the last 300 years. Again, peoples personal attitudes take precedent over the law. Eagle are a protected species as well as the symbol of our nation. If yu were to harm such a bird, on purpose, just because he caught a fish for a meal you wanted to catch for sport you would be a punk and criminal. Thank you for your opinion though, Oh Great Self Proclaimed Herder of Fish.
I am also not so sure "not for the eagle and herons to eat" is entirely true. When you make attempts to restore a population or body of water to its natural state as many have tried to do, fishing is only a benefit.
I sure hope you don't hunt, someone might shoot yu for trying to kill one of their deer. One sad dude.