He's not a coward, he's just frustrated at the lack of empathy you have. Nonetheless you're just some guy on the internet and don't and can't make an impact on his hobby but you're choosing to make yourself a lightning rod so obviously you knew you were going to get struck. Fishing kills more fish every year than hobby mining. Fish that are lethally hooked or fought until they die, redds trampled by bankies etc. PETA has an anti-fishing campaign called "Fishing Hurts". They say the same things and act the same way the "Fish not Gold" people act.