It took me a little while, but I have come up with an idea. What if DayZ added a feature that added hordes of zombies, not 30-40 but about 100-200 that would move about the map together, and provide a real challenge for players who make the mistake of shooting a bullet near them. The horde can also branch apart, but come back together soon. It isn't that good of an idea, but I hope you guys like it! :D