In case you were not already aware there's a change going into affect today in regards to how Parental Controls work. The following is a snippet from Vrakthris' post in our forums.
"We will soon be sending out an email to those accounts that have Battle.net Parent Controls enabled. This email will be received by both the Parent as well as the "child's" account.
We wanted to let everyone know this was coming and, considering how many phishing emails are out there, that it is indeed from us.
Obviously it is entirely possible that someone may use the opportunity to send out a phishing version of this so always be sure to check the source before clicking on anything. Or better yet, manually visit the Account Management page by entering us.battle.net in your browser."