fantastic elizabeth - this good news .... for me anyways
You could try to get a hold of an old coogan the cock less detective cartoon from picture magazine that dealt with this issue it went along the lines of .
The victem has been stabbed 47 times in the ass 23 of them in the anus .
Well he might learn not to moon the local darts club.
Hang that up in the classroom.
Might get them thinking twice if you have a dart on your desk 
best wishes!
