There should be such open field, where you get the chance to kill your own faction. If it would be on WotlK it should be either Icecrown or Wintergrasp (not in battle) maybe both
The area with the best resources available should be the place to fight for em whoever tries to take it... real pvp, bring it on!
Griefing and /ignore would take a whole new meaning , even fight with your friends not in a stupid controlled /duel