Computer Lab issues

We have an issue going through the school at the moment, something that I have not encountered for a while now and surprisingly never happened in my computer lab, until now.

The messed up keyboard. It seems that the thing to do is to change the keys on a keyboard and see what words you can make.
I will be having a chat with the students that sit in particular seats this week. Surprisingly the students sit at the same seats each period, so it is easy to sort out who has done what. But why do it? boredom, work too hard? Guess I will find out.