Sure, everybody, take Hart's advice and turn in your old guns for destruction. You don't want that old Colt Paterson or Revolutionary War musket anyway. Turn in all your guns and make this guy even happier.
I can only think that Hart is working with indoor ranges and has gone completely overboard about the dangers involved in use of lead.
Yes, lead is toxic if lead fumes or lead dust is inhaled or lead is regularly handled. Bullet casters need to be especially cautious, and indoor ranges have serious problems with lead. Further, lead accumulates in the body and is not flushed out as most other poisonous substances are.
But are we to believe that a box of .22 ammo emits so poisonous fumes and people die by the thousands for miles around. Nonsense!
Many older guns have soft barrel metal that was never intended for jacketed bullets, and only lead bullets should be used in them.
Jim