You guys should have a walking dead event! lol
Like give characters only certain "survival" items, such as bows, katanas, bandies, etc (have no abilities not associated with a
'realistic" experience, like magery and stuff)
and just have zombies take over certain parts of the world (so not to interfere with anyone that doesnt want to participate)
If a character dies, they turn into a zombie, until killed by another non zombified player. But the zombies have to be killed multiple times, and resurrect after an established period of time unless if you are able to incorporate special head shots, or whatever really kills a zombie

thats about all i have, i thought it was worth posting lol