Lead, from ammo, is inert.
It doesn’t cause “lead poisoning”.
There may be a case from processing and handling molten lead in making ammo, but not in spent lead laying around.
Haven’t you seen the warning labels on every product in the store? People from California are known to eat everything, from anvils to xylophones. I suspect they are indeed at risk from eating dirt brought in from Hawaii.
I’ve heard of reloaders being exposed due to vibratory brass cleaners.