Well yes, doesn't everybody pull the anchors out and chew on them? Has California just totally gone bonkers or what?
Well, unused (and removed) anchors tend to just "Lie about" in tool boxes and "junk drawers."
If the goal is to remove lead from "the environment," then lead anchors should be held off the local market.
N.B.: plastic anchors work quite well up to #8 and, maybe #10. After that, ther are zink and alluminum anchors as well as epoxy anchors.