Statements like this with out any facts are just myths , old wive tales , and opinions. Why not put some fact behind you statements. There are plenty of places on the internet to find these facts and post them. Crappie population is cyclic , you have a couple of good years then you have a couple of down years. Some small lakes may have too much fishing pressure but they usually make a come back in a couple of years but they would have to be a very small lake for that to be the case. Most small ponds, lake ect become over populate and size is reduced , food source is depleted and if over populated with predator fish will be the largest factor in population reduction, not fishermen unless most fishermen are a lot better at catching their limits than I am. What we need is an honest poll for fishermen willing to tell the truth about how may times a year they actually catch their limits. Bet if the truth be know not very many catch a limit of fish very often in a years time. Just my unbiased opinion since I have look at a lot of reports on this on the internet.
Be as smart as you can, but it is always better to be wise than to be smart.