I do have to agree with Leet, because of the whole leveling system, players who join the server don't stay for too long because they get wrecked by players who have been there longer. It should be about skill, not who has more hours on the server.
There should really be a system implemented where, say, someone who is level 10 combat cannot hurt someone who is level 5, but that level 5 person can hurt the level 10 person and he can then fight back. That way it's the lower-level person's choice of whether to engage in combat or ignore him. Once someone dies, the battle between them ends.
Edit: Zeblote, I suggested this idea a while back.