Hmm, I think at 7 you have to ask how you would feel if an emergency broke out. I'm not talking fire etc, but if you lost power for example, would you still be able to talk on the phone? (lots of phones these days rely on electricity, mine stops working if we lose power)
: would she follow the rules that you lay out (i.e not answer door/see friends outside & want to say hello/touch what she shouldn't..you say you trust her, but when she is alone, are you 100% sure she will not break them? It is completely different when there is no on around to see you!)
: what if she told a teacher that you leave her while you drop a sibling off? I don't think it is a safeguarding issue, but I am pretty sure that most people in a safeguarding position would think it was too young.
: Also, are you happy for it to be common knowledge? Because I think, eventually, she will tell someone. More so for the "see how big I am" factor. if you are OK with people knowing, no issue. But you have admitted that you would be embarrassed to say if anyone asked...
Personally, I think it is too young. My dd2 is 7 and she isn't at all ready to be left alone. Dd1 was very sensible, and still, I don't think I would have left ehr either.