The only reason areas like this don't see much activity after a while is because they're pointless. I'm assuming you mean areas like the PK arena, or certain areas that play a minimal role on the server. Think, if you had this entire new way of fighting, but people would rather fill you with lead, would you still want to fight with your fists? It's just like how sparrers use arenas meant for their unique form of combat rather than fighting in the street where people could intervene at any waking moment. I'm sure people would make use of it.