I've talked to several women that mentioned that when they are making a draft in their own user sandbox, other users (men) has interfered and "helped" them. They didn't like that other people had access to their work before the first version was ready to be published.
Stewards could have access to the private sandboxes, but no other users but yourself, even administrators.
A version that you could give other trusted users access could be a feature.
I talked to Quim Gil today and he said that this requirement should be registered and looked at.
This could help on topics like Gender Gap and harassments.