Around here the local CO carries a magnet with him during waterfowl season. If he can’t pick up your shell you are in deep do-do.
Since I hunt on my own lake on my own property I haven’t figured out if that ban applies to me or not, so I just ignore it and use lead also.
they do that here as well - they use one of those magnets that they put down a cow’s gut to pull out nails and magnetic stuff that cattle will swallow.
i hunt a raised blind in the middle of a tidal marsh - can only get to it by boat.
it would be an easy matter to dump a box of shells before they got anywhere near me.