Not sure where you are seeing them, but I think it will be okay. It is true that the balance of a fishery is delicate, but reproduction wise, crappie are pretty good at it. It has been a problem in ponds that crappie overpopulate,and cause stunning and loss of other game fish. Big crappie act a little differently than regular sized ones too. For this reason they have been somewhat protected from over harvesting. Now that the fancy see all electronics have come out, that could change. A healthy balance will continue to be important.
Sent from my SM-A505U using Tapatalk