There will be no real PvP system

[crayhorse]

Because griefers live to grief you.

Very true. The flaw in your thinking Bolty is to believe that some honorable form of PvP play exists. PvP is inherently about denying another player what they want to accomplish, i.e. causing them grief. No matter how carefully Blizzard designed WoW, there will always be opportunities for mean-spirited players to annoy and harrass others, even on PvE servers. So it's great for non-griefers and griefers alike that Blizzard created PvP servers to attract the griefers off the PvE servers.