It depends. My program only has around 300 students total, so being part of the Facebook group is almost necessary as important announcements and events are posted in it. It comes down to how much you value these relationships, because many of these people can become your future professional colleagues. You're going to have to become more comfortable with networking and interactions on social media, because I've connected with employers online (obviously not Facebook, but you get what I mean), and opportunities have been given to me based on my online profiles (Linkedin primarily). If this is an undergraduate program that has thousands of students, then it's not necessary to join the Facebook group. But, social media exists for a reason and it's a good way to keep in touch with people and seek out opportunities. We live in the digital age of information technology, and platforms like Facebook, Twitter, and LinkedIn are vital parts of that. P.S. I messaged some of my classmates in the Facebook group prior to meeting them, and we arranged a time to meet up for drinks and got to know one another. I don't see what the big deal is. Do you have things on your Facebook that you wish to keep private and hidden away?