I think Sam is right on. I'm both a tournament and recreational fisherman who spends 100-plus days a year on the water. For the most part, all of my fish are released. However, a couple of times a year, Donna and I will keep a mess of spots (Kentucky) bass to eat, usually from Beaver Lake, where they are more than plentiful and there is a 12-inch minimum length limit.
I've brought this up before but will say again, we pay the MDC and AGFC biologists darn good money to formulate management plans for bass and other species in Missouri and Arkansas. Without fail, those plans are centered around length and creel limits. If EVERYONE releases every bass they catch, then those limits are meaningless and the management plans may as well have never been formulated.
Personally, and I'm no biologist, I believe all trophy bass should be released in the interest of advancing the gene pool. Otherwise, I believe there has to be SOME harvest in order to balance the bass population with the forage base.