DS is 6 and is perfectly capable of opening the front door. I've often told him to go and open it, if I'm busy and then I'm not far behind him to see who it is.
We've had a fairly nasty incident recently with a neighbour and we don't want DS to answer the door anymore. I don't want to say "don't answer the door cos it might be the crazy woman again" because that surely is going to give him ideas and make him nervous. But we're having to go back on behaviour he's already got used to, and somehow we have to do that without making him aware that it's because of the crazy woman. IYSWIM.
Now, DH says that he wasn't allowed to open the door at all as a child. Doesn't say how old he was when he was allowed to, but clearly thinks we've done the wrong thing allowing DS to do it at all.
So, how old does a child have to be before you're happy to let him / her answer the front door?