I'm in the same boat as Tri as far as writing at work goes - I don't even have time to think about fanfics in the classroom, let alone attempt to read or write them! Once in awhile, one of the kids will say something that makes me think of something in a fanfic, and that is always good for a private laugh inside my head. Today one of the kids was reading a book about the state birds, and I heard him laughing with my student teacher about the state bird of Delaware... before she even said it out loud, I thought to myself, "I bet it's the blue hen." Sure enough... blue hen. Writing Broken gave me that little tidbit of random trivia; I never would have known that otherwise LOL.
But anyway, props to those of you who can write at work! I love my job, but sometimes I wish I had a job where I could do things like that LOL. My summer job in high school was like that, so I've had the experience of reading fanfic at work... just not in a long, long time!