I did something similar in the 8th grade. Not as obvious, but they were taking random pics for the yearbook, etc, and we were all standing around a table in shop class watching the teacher make something. I sat there with my chin in my palm, elbow on the table, and makeing a fist...except for the bird going up along my cheek. Never heard anything about it.....fast forward a month or so, I get called in the office. The principal asks me to sit at a desk, elbow on the table, chin on fist, and asks if I know what this is about. I say, no. Then he puts the picture up on a screen.... OMG....uh...wow, it's pretty obvious I thought to myself...I had no idea it would stand out like that among the other kids. The nerves kick in. I don't think I got in any trouble, but I was dreading any calls to my parents. I probably got a detention or something. Never did it again. Was a pretty good class picture other than the finger. It never made it into any yearbook.