Level 1: scurrying, following, leaving their workstation.
Level 2: calling teachers the wrong name, jucking.
Level 3: hugging people and throwing cat hairs.
Level 4: bothering the Democrat Boy, talking about parcel bins, saying EDMUND and EVELYN/MURIEL and mentioning the Daily Mail to the Democrat Boy.
Level 5: Quacking like a duck.
Level 6: spitting in bins or at people.
Level 7: repeatedly uttering the same phrases.
Level 8: chewing or gnawing of computers, throwing biscuits.
Level 9: following people home, bullying spuckers.
Level 10: attempting to wipe things on people.
Stephen: that is rattenkrieg behaviour Level 5.