Just had a great idea... If you get a bite or scratch on one of your limbs, I think your multiplayer friends should be able to amputate in order to stem the risk of zombification. Reduced ability would obviously follow accordingly, but it would be funny having a safe-house full of limbless veterans. This would only be acheived successfully if your community has access to the required first aid supplies. Failing that, the player would probably bleed out of die from infection. Perhaps infected limbs could be green or something on the in-game health window? Just a thought. What do you reckon?