Yes, I regularly have warzones where I haven't died or only died once. The trick is, don't stick around till you die. When your health is at 10%, there is no point in dying. Force cloak out of the fight, hide and heal up, then get back into it. Running back from the repawn usually takes longer. A good healer doesn't hurt either. Most of the time I have 0 deaths is when I have good healers on my team. Keep the healers alive and they will return the favor.