Skulltooth

I like the idea. It adds a kind of Amnesia feel to it (if you haven't played this game, you're missing out). It would definitely be scary if while you were doing all of the searching for these messages, the closer you got to the final answer of the story, something were to happen (I won't say what, but just something horrifying). Who knows? Mountain Dew wouldn't be end game anymore.

If you all have different GUIDs, you should be okay (basically if you're not all logging in from the same account). That's how Computer Cafes work. You shouldn't have any troubles playing from the same IP, but if you want to be extra careful about it, find a server with a website and send the admins a message. Just ask!

If you really wanted Zombies to be realistic, add in some infection process if you're hit hard enough. That's the whole scare behind zombies, is it not? If you're hit hard enough and a wound opens up, why not have a slow infection (depending on where you're hit and how hard would determine how strong/fast the infection is)? I think this would add so much of a more fear aspect to the game about the zombies if they can actually do something to you, other than slap you in the face and hope you go down. I dunno, that's my two cents on it. First post btw :D