Enzyme
Well in this case, the perpetrator was acting in a way which he himself defined as "amoral". Being on the receiving end is somewhat emotive, so perhaps my perception of what is/isn't vituous in this case is somewhat skewed.

My own opinion was that this wasn't normal pack behaviour, but motivated by neurosis.
(Bicycle Repairman "you're also a bit of a wanker", Tue 22 Apr 2008, 11:51, Reply)