Well, it seems the complaints about AFK (away for keyboard) firefight players have been answered. In Bungie's weekly update they announced that players who frequently AFK during Firefight will have there credits reset. They also said they would be keeping a very close eye on it to make sure that know one gets unjustly banned.
As someone who loves Firefight; this is great news. Maybe now there will be more people playing the game correctly.
That's all I had to say, I just wanted to share the good news. Link.