Not sure if this has been talked about before. When a zombie fixates on a player, it will chase that player and only that player. Even if there is another player just standing around. Currently there is no way to fulfill the adage of "you don't have to be the fastest, merely not be the slowest" When the zombie numbers increase, I could see as a viable tactic to whack a nearby survivor as you run past and then watch as they get swarmed by zombies. Here's hoping the zombie AI gets better.