I know many hunters and recreational fisherman who cite their pleasure in and love for nature as one of the reasons they pursue the pastime. And I always find it sad and puzzling that they can't get this enjoyment without having to kill or at least inconvenience something in the process. I realize that the purpose behind catch and release is not to kill the fish, and, as I said, it disturbs me less when barbless hooks. But I still think it's wrong. How would you like it if you were suddenly caught by something from which you couldn't free yourself and then dragged, struggling, someplace where you couldn't breathe? After that, some large alien creature looms over you, forcibly holding you still as it clumsily extricates you from the trap. Even if you were then returned unharmed to your own element, you would be justifiably miffed. Now, of course I'm anthropomorphizing here, but the gist of the experience is the same. And you can't tell it doesn't suck to be the fish in this equation.
All in all, I am bothered less by people who eat what they catch. There are plenty of poor people up here who use the fish they catch and the deer they hunt to supplement their food supply, and I have no problems with their doing so. But when it's just for fun, I say it's spinach and I say to hell with it. (Points to anyone who gets that reference.)