ruin a player of the other faction's day by

For many players, there's little pleasure to be had in combating players that are lining up for just that. I'd much rather ruin a player of the other faction's day by;

Killing quest givers www.euwowgold.fr
killing a rare pet that they are trying to tame
kill them during a pet battle
Destroy their questing vehicle (such as the kite they use to water the fields in half hill)
Killing a player over and over again
Dismounting them while they are up high so they fall to their death (it costs them more money)
Snatching things on the neutral AH that go up for cheap just so they can move it from one faction to the other
Doing whatever it takes to ruin the other faction is the name of the game. That's true role playing. That's what is honorable.