Im at the park. The only people here are me, dd1, dd2 and a girl who looks to be 3. Dp is in the car and there is another car in the carpark about 100m away with someone sitting in it reading a book but there are so many trees, play equipment and a toilet block in the way for that person to see this little girl even 20% of the time. It is an enclosed park but there are multiple entry/exits. Anyone could take her. She can only be seen by the person in the car on 3 of the 13 pieces of play equipment.
Personally I like to be able to see my kids at least most of the time