Title says it all, really. It happens at my school, there are about 5 of them out there every break and lunchtime and I feel it gives a very bad impression of the school. They cannot be seen by pupils btw
as pupils are 'locked in' from 8.45.
As a teacher I find it inappropriate, as a parent I know it would put me off if I saw it happening at a school I was considering for the dc.