Agreed. But you can't stop people from doing questionable things. I only refill refillable canisters, which are more expensive but the break even point is only 5 refills.
California is definitely banning the 1 lb propane canisters because they're not recycleble. I have also heard that many national parks will no longer sell them in their stores. In my opinion they are expensive and a huge waste of resources. A 1 lb canister costs about $6 at walmart; compare...