I agree with oscar 73 about keeping all on a 200 acre southern lake.
Smaller lakes and ponds and hard hit city waters can easily be overfished and in those cases returning largest males to the water will insure a better overall size.
It is interesting that I had a fisheries bioligest at Reelfoot Lake in TN. tell me it is impossible to overfish bluegill also. Bring that same so called expert up here to the midwest and he would get an education in a hurry.
I'm no activist by any means, but in this area ,it is not hard to overfish ANY of the smaller waters. I sure envy your southern bluegill populations. Mike