we're talking constant open world pvp
castle sieges (king of the hill type stuff)
battlegrounds (team deathmatch)

you can not stop others from pvping you
the amount of extremely good farming areas are highly contested

you get 300k karma
-60k killing someone
-20k killing their horse wagon

you lose xp on death
you lose more xp on death if  you flagged on someone else (less if they flag on you)

after hitting 0 karma when you die your gear literally disappears (we are talking 50 hours to farm for some of these items)

you regain karma through pve

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game is hilarious and entertaining
the next expansion is releasing an area for people with negative karma called an "outlaw town" where you can be pvp'd in town---and the guards of the town attack anyone with positive karma---and there is no penalty of gear drop on death

certain things are exclusive to the town.