This could be a neat element, truthfull even though a lot of these ideas are cool i would be fearful if too many made it into the game just due to so many mechincs existing may lead to shallow gameplay with an overcrowding of features.
Looking at all the posts of people and their friends makes me want to stop messing with people when I play...everyones just a pair of pals roaming around having fun!
It's possible that your body timer just passed or a server restart happened, not too sure mate but id suggest to start to look at DayZ like this "nothing is forever" it actually makes the game a lot more fun!