It looks like you're new here. If you want to get involved, click one of these buttons!
Well, it's not full PvP. You can "join" a group of bandits at one of their camps, turning you red and turning the bandits friendly. Afterwards, other players can attack you, but you can't attack back. They also brought some neat WvW mechanics in PvE, with supply caravans, sieges by mobs and other things that should've been in Orr two years ago. Still, it's nice to see the game develop a bit in this regard.
Clearly, they're testing how well a mix of PvP and PvE could work.