Bro, why would you put something like this up? There are already enough accounts being stolen on Xbox Live as it is. Why give a reason to add to it? Just think about if it was your account that someone did this with.
This thread should be locked from further attention as it shouldn't have gained attention in the first place.
This should have been reported instead of trying to scold the kid.
But he's banned now, so just pretend like this never happened.