I'm totally baffled that you guys are able to/know people who are able to contact their teachers on Facebook...
My teachers wished me Happy Birthday on Facebook. xD
I have the Digital Media department chair at school added, too.
I guess it feels more normal at a school where you're on first-name terms with teachers.
I decided not to take down my facebook because so many of my college friends and teachers are on it, as well as people I can't see often anymore. The only thing is I don't like when people tag me in photos of me I didn't know existed.