Reading the wiki on
PvP I don't see an option for just going into the world and turning on and choosing to be attackable by other players that also turn on their PvP flag.
I would prefer to have the option to turn it on, and have engagements of PvP in the open world.
With some Risk vs Reward. With a bit more XP, Gold, Resources being flagged.
I know there are plenty of options for PvP in the world, but I wouldn't mind just doing basic gameplay content and still be in fights that aren't just PK'ing.
Some of my best gaming memories have been in open world low consequence, but high risk (loot / resources) PvP.