This has always been my biggest issue with FB and Zuckerberg. Having multiple identities is inherent to being human.
"Who are you to tell me to avoid partying!? I ran a deep internet search on you dad. I saw how you lived college! Why cant I do the same!? What kind of hypocrisy is this?!"
This mindset is one we are all familiar with. Its part of youth. Its going to be very challenging to parent in the future where people can find out everything about each other with simple searches.