Even when a recall is heavily publicized, not all of the items are recovered and returned to the manufacturer. That may be the case with the Galaxy Note 7, a smartphone that has a small chance of suddenly exploding for reasons that even the manufacturer still doesn’t fully understand. So why don’t phone carriers just block the devices from their networks, or why doesn’t Samsung remotely brick the devices to force customers to stop using them? Turns out that’s a tricky legal and ethical issue. [More]