One of the reasons I hate android is how easy it is for a child to get around the Google username or play store pin to do whatever they want, that's why bb10 is so good with its ability to lock out the app store and Internet completely.
If anyone ever gets information on what it's abilities are, whether it's typical android or will it have a bb10 like options menu post it here.
But you're wrong, my 7 year old has a Nexus 7 with their own login and my login is just a PIN. I'm pretty sure the average 7 year old has more knowledge than most on this forum and my account has never been accessed.