Rule idea: colleterial zone.
body blocking is really annoying as cortex, I'm not innocent, but it really fucking annoying when you lose 20 amniocytes because they were near a zealot that was in dire need of being lit up.
so to end it the devs could give a small vicinity around limits where people are combat flagged and thus if they're shot and killed in that aura, they're not considered unjust or a crime, it's just colleterial, this wouldn't only end body blocking but would keep inline with the theme and atmosphere with the game.
think of a tragic prole who never did anything wrong just kept his head down but died because he happened to stand near a scumbag, that's some dark stuff right there.