Big... bigger... biggest (error in judgement)

So tonight I was teaching a class on Twitter at the local library, and my colleague was co-teaching. I set up a Twitter account specifically for the class with my most family-friendly email address, and followed a few boring people, like a cheese critic, a local news aggregator, and Bob Vila. My screen was projected on the wall several feet high and I'm going along showing the class where "followers" and "following" are, and my colleague says, "Oh, look, someone's following you. Who is it?"

In...