Often these nemeses drift out of my consciousness, others turn out to by pretty decent people who were unknowing victims of ludicrously rash judgements.
I try and have at least four nemeses on the go at any one time, it's healthy to do so.
to the hatred which they I have sort of a nemesis club with one like-minded friend where we mutually identify nemeses for each other and outline the reasons for wishing our enemies' downfalls.