Good food for thought...and speaking of food, it probably wouldn't be a bad thing to keep a few fish once in a while. Like most people on this board (I suspect), I release almost all my fish in freshwater - in fact, I haven't kept a trout caught in the park. However, I've heard about what happens after a major mortality event, like a flood; the average size increases, while average fisherman catch rates stay about the same. So, some selective harvesting might be a good thing.
Of course, the majority of the fish I catch fall just a bit short of that magic 7 inches, so the point is often moot...
