I have no idea how old they should be before being legally allowed to be left alone. I need the education!
There is NO WAY id leave my 2 (7&4). So i dont even need to consider the legality yet. What if there was a fire, or one of them was sick, or some wierdo knocked on the door, or there was simply an incident between them or an accident of some kind.
Even if they are sound asleep, it doesnt mean one of them wont wake up after a bad dream or start being sick. (rare, but does happen time to time).
I do let mine play out though, start to give them a little freedom, road sense and general street wise sense. Im never to far and check on them every 10 minutes or so, they are always with other kids and arent allowed to play out if there is noone else out.
Dh, looked after them one day, and i later found out from dd1 he had nipped to the post office and left them home alone. I was raging, bloody furious with him. Especially after he had tried to keep it a secret.
I dont think its wise to leave kids home alone up to age 14ish? (depends on the nature of the child in question too, and who else might be there, ie younger child to look after or another teenager who could easlily become involved in a row). I dont think its wise not because of the risk of abduction but because of all the other common household safety issues.