Oh, overfishing is definitely an issue worldwide. No debate there. That includes commercial and private fishing. I am a responsible fisherman/sportsman though, and I only keep what I am going to eat and I follow the regulations to the letter when keeping anything. Same goes for hunting, though deer are actually overpopulated in my state, so the state is actually encouraging hunters to kill more then they are going to eat. Even still, I don't kill anything I am not going to eat, except the occasional mosquito.
I'd rather self sustain with hunting deer, fishing, and raising chickens myself then trust the government to make sure my food is safe. Unfortunately, it's not an option in today's world, so I do my best to stock my freezer with deer and fish when they are in season and grow my own vegetables, but even then I usually end up buying store bought meat a few times a year.