I've also been been told by a cop that I should notify them that I'm a CCDW holder even if I'm not carrying (which is false) and that in Ohio if I'm riding a motorcycle without a helmet, I need to wear glasses even if I have a windshield (also incorrect). While I don't doubt you may have been told this by a game warden, it's completely incorrect and you have every right to continue fishing after your limit is in the box. In reality, you can catch every walleye in Lake Erie in a day, kill them, then throw them back in the water so long as you only keep your 6 (or 4 in April). I personally don't have a problem with someone continuing to fish past their limit, so long as they are responsible enough to take care of any additional fish they catch and ensure they're released quickly to maximize their chance of survival.