“Imagine someone stole something from you. You can’t get it back, but if you could, if it had a kill switch that could be remote[ly] launched, would you do it?” Satoshi wrote in a Bitcoin Talk post. “Would it be good for thieves to know that everything you own has a kill switch and if they steal it, it won’t do them any good, even if you lose it anyway?” If he returns it, you can reactivate it.”