@AyaJulia:
That's one thing that bugs me about world PvP. I don't want to talk in Common all the time, but I've played RPG's long enough to believe that my characters should have a backstory, and should behave consistently with their race, class, and motivations. My first character was a Dwarven warrior, and when I think of dwarves, the first profession that I thought of was Mining, so I made him a Miner. My druid and shaman are Skinner/Herbalists, because it makes sense to me that those classes should live off of the land.

However, in regards to random PvP, Blizzard is, as Don Vito might say, asking me to kill a man I do not know. If I'm going to do that, I'll need a valid reason, and WoW doesn't seem to have one. The Alliance is not at war with the Horde. In fact, both are tenuously aligned together against the Legion. They cause occasional border skirmishes and stolen supply shipments, but nothing that justifies my randomly killing an Orc who's just going about his business in Zangarmarsh and not threatening me in any meaningful way.

If anything, such unprovoked attacks would simply aggravate the current tensions and possibly throw Azeroth into another war. As I recall from the Caverns of Time storyline, cooperation between the Allies and Horde was the only reason the Burning Legion couldn't take Azeroth; why would I want to start another war at a time like this, when the Scourge is rebuilding its armies?

Random PvP is much more justifiable in Warhammer, where the bad guys truly are evil, and the sides are actually at war with each other.