PVP.
Me and my group never had a problem with people interfering with our stuff/attacking us or anything like that in W5.
We made the oh so smart Idea of making our camp where 3 rivers cross. That's six directions a boater could come from and see us. Oh we are s smart.
We've had people kiting bears and boars through our land, and we lost a lot of our clay (which we have to go on expeditions for), kilns, oven, and drying frames full of bear and boar skins.
We're moving to a place near a well but far from any river, and I'm putting up palisades immediately. We lost a good hearthling already.
I should be upset, or something. But I'm just determined and having huge amounts of fun adapting. Ranging here I come.