Honour and Prestige are meaningless, beyond a certain point. No one respects Noble A more than Noble B because the latter has 120 Honour and the former 125. And Prestige has no real in-game effect on how famous or infamous a particular noble is. Respect and fame are decided by what a character does, not what his H/P scores are, and a noble that is known for continually refusing legitimate duels will become known for it, with the commensurate loss of respect from other characters.