Craig

Many people do wear them under their shirts. I am the deputy head prefect, so people get their knickers in a knot if I break petty rules <img src="images/graemlins/confused.gif" alt="" />

The main reason is that people take them out of their shirts, leave them out, and they don't really fit in the colour scheme of the uniform. If nobody can see it, then it doesn't cause a hassle. It seems that all teenagers need to rebel by making fashion statements, so now fashion is supressing practicality [end of little rant].

The whistle is similar to Doug's modified whistle :
I was bored, and had the same colour whistle as my brother...