Originally Posted by drhandsome

I imagine this is due to safety concerns? If the battery of your mobile device overheats and/or catches fire while it's charging (which is not unheard of, see the whole Galaxy Note 7 fiasco), you will notice it immediately if you're using it. If it happens while you're asleep, well, I imagine that would be a problem, especially if it happens in the middle of the Atlantic Ocean.

Originally Posted by drhandsome

I'm just guessing here, but maybe it's possible that the safety risks of charging mobile devices are deemed acceptable if it's done attended but unacceptable if it's done unattended. I don't know, don't quote me on this.