[Toomuch]

In my glory days of Sullon Zek pwnage, NPC agro in pvp was set to something like this:

NPC's didn't care if you were the aggressor and had higher faction, they would remain idle.
NPC's DID care however, if damage was done by the person with lower faction, and would immediately engage.

I got onto Sullon Zek late, after discovering Everquest late in the first place, and had no "crew" that I was part of at the start, so I did a lot of things on my own... As an un-twinked newbie ranger... On the underdog team. So yeah, I had to get creative with my tactics.

Long story short, I farmed surefall glade faction and would sometimes wait for druids to port in right next to a pile of their own class trainers. The druids, of course, never thought to take off their long duration damage shield self buffs. I'd hit them once, damage was returned to me, NPS's would call random neutral druid out for being a douche, and BAM High level neutral druid down (but not coined) in SFG. Go Go Good Team! Druids love the good gusy! (Yes, I was in Flowers of Happiness at the time, like my homey Fansy)

I wish I would have saved all the screenshots of the epic raging, crying and namecalling that took place in those days... sigh, it was good times.

But anyways, that's how NPC agro used to work in pvp.