In Europe, they would be required to accept and recycle it at no charge. Manufacturers should be responsible for the cost and recycling of their own products. That way, they have a stake in making new products easier to recycle.
I think this would be a great idea to implement here. This may be one of the reasons I've read the cell phone manufacturers are looking at switching to a universal charger so that old ones don't get dumped....in the dump. Imagine never having to hunt through a drawer full of various voltages, connectors etc if someone is over and needs a charge!