This is why I never flag up for pvp. World PvP consists purely of griefing. There are no longer world pvp objectives as far as I know. Like there was in Outland, where you could fight over “control” of a certain area. Still even then the most world pvp ever accomplished in game was allowing people to be a**holes on the internet.
It doesn’t matter how high they raise the bonus from warmode. You will always level faster and with less grief without it on, because you are not spending so much time corpse running.