At the moment killing players who log out does not effect them what so ever. Have killed several friends who log out, and their characters are still alive and able to login, and it allows for gear duplication
I think this should be fixed ASAP, as the previous patch was supposed to fix duping.
Surviving a firefight is now also as easy as hitting escape and logout, because no matter where you can log out with the knowledge that the next server you join will have your character as you left it even if you were being shot at, or pinned down.