Perhaps there can be a mechanism where a player can offer "friendship" or "truce" which will disable the ability for that other player to attack you. This opens up to trade and help on a temporary basis. Then again that may disrupt some folks strategy of claiming to be friendly and then the minute you turn your back they attack and take your stuff.... Just a thought. Other wise I like the idea of roaming hoards of zombies. *as always can we fix the zombies attacking through floors and running through walls?* sorry i always ask that :)