What is the most evil thing you ever done to someone on a multiplayer/coop server?

locked my friend on a roof and watched as they tried to open the door....good times

I used the entire bleach supply to kill myself so many times in our safehouse that everyone insta got corpse sickness.

Unlucky my friends who played PZ cant play this days, so I'm alone, but a old story from one friend is:

Group a lots of zombies making and horde, get close to their house, and turn on an alarm inside the house, making all the zombies raid the coop house they had.