I read elsewhere that the lack of security for the admin account was an intentional design decision. I'm curious to know what the benefit of allowing students free access to the admin account would be. In our family, it's not a trust issue so much as a management issue.
Which is why I'd like to suggest allowing the admin account to allow selected features to be available to other accounts. I'd like my kids to be able to see progress reports, grades and such without having to switch to the admin account where accidents can occur.