Harvard University
You can't.
You cheat and say you are older than you really are.
A lot. Using facebook is not really restricted to any specific religious groupings.
On facebook, when you restrict a friend you are limiting what they see. They can only see things that you post that the public can see.
I think that's a terrible idea. I miss the days when it was restricted to college students; when all the kids had to go play on MySpace.
use another computer
Anybody can use facebook
The answer depends on whether you are measuring the age of Facebook from when it originally launched as "Thefacebook," or from when it was opened to the public. Facebook was launched in February 2004 with membership restricted to students of Harvard College. It wasn't until September 26, 2006 that Facebook was available to anyone age 13 and older with a valid email address. Twitter launched publicly on July 15, 2006, making it older than Facebook for most users.
College network statistics are not found on Facebook. These are usually found on the college's website.
Either they're not your friend, or they have restricted access privileges and do not allow it.