I really wish that I could have found the article that I was originally looking for. About two years ago, they had a write-up on the affects of limits on panfish, where they compared data from inland rivers and lakes in states with and without limits. What they found was that fishing pressure had minimal impact on panfish, with environmental factors (spring flooding, low water, etc) and the population of predators in the system being the largest contributors.
I know that there are fish-hogs out there. While they may be few and far between, they are definitely the ones that get the most attention from other people out on the ice. The only time a 15 fish limit would have impeded my adventures was last year, when we were catching crappies on a small lake in NE Iowa. The lake had a bad winterkill last year, so our self-imposed limits flew in the face of mother nature.
I for one wouldn’t mind limits, just want to make sure we’re not getting into a “holier than thou” habit and stepping on toes. Flyrod purists have monopolized that practice for years, and I don’t think the sport is any better for it.