They bring them to the scales because it's more likely that some people will cheat if left to their own devices. The tournaments I fish have very good release rates and I am glad for that. They require us to take great care and we are penalized if the fish die...and that could be the difference in taking home a check or not.
It has always seemed rather odd to me that it is ok to catch limits of any other fish, and keep them, but not bass. The same people that establish the safe harvesting limits of all other fish also establish this limit for bass, yet the people that keep bass are often the most vilified of all anglers...even by our own kind.
For me, I don't keep anything, opting to get my fish from the market. It not the C&R I worry about, I just don't feel like cleaning anything when I get off the lake. I spend anywhere from 5 to 10 hours on the water when I go and the last thing I want to do after parking my boat is worry about cleaning fish. Besides, if I kept even half the fish I catch, I wouldn't be able to keep up with consuming them, so they would go to waste and I am not for that, either.
I think local limits and management styles should be different for smaller bodies of water...FOR ALL SPECIES within those waters...and the people responsible for those waters should be active in this. If not, the fault is theirs and not the anglers, as long as the angler is being legal.
In waters with sustainable ecosystems, I have no problem with people keeping a legal limit of bass. If the DNR then wants to adjust that limit, so be it...they do that by shock data and creel surveys and as waters change, the limits should, too.
If a person wants to keep his legal bass, no matter the size, then who am I to condemn or criticize. That person has the right to do that. I realize it is a touchy subject, but lets not condemn those that keep legally caught fish, including bass.