Facebook wasn't a topic of conversation in high schools 10 years ago — it hadn't even been invented yet.
One decade and a billion users later, and with the introduction of Twitter, Instagram and other social networking platforms, it's become an unavoidable cultural commodity. If you're a teacher, your students most likely have profiles, and vice versa.
There are plenty of examples of Facebooking-gone-wrong in the education field so far. There's the teacher in Pittsburgh, Pa., whose colleagues discovered her photo with a stripper online, and the Boston-area teen who was arrested for alleged "terrorist threats" in a rap video he posted to Facebook.