I don't think we'll ever get the PK intensity that came with UO again. There weren't many MMOs on the market when UO was out, so everyone played. Now, people who don't want to pvp (or be killable) can decide to not play that type of game.
Hopefully there will be enough sheep though, people will have alt crafters, etc..
But, regardless, no one likes having their town pillaged and razed.
