Yes, meeting with people "IN PERSON" is lovely, and it is how I prefer to do things. But Facebook is invaluable for letting me keep track of events and student groups that I am running. It's a lot easier to message all the members of a Facebook group than it is to keep a long lis of emails handy, and Facebook reminds me of upcoming events and whatnot. Plus there are plenty of friends who go to other schools that I can still keep in touch with, and easily.