I believe OP referred to another thread, where players expressed the desire for disabled head to be an immediate death, or provide additional damage when hitting the head:
So basically disabled head is still a head in use, grenade, rocket, sniper riffle or Hell Cannon is not able to kill anything by hitting it in the head… yeah… I think headshot (disabled head) should kill at least every humanoid in game. This way we would get a lot of new tactics and much more deadly and dynamic gameplay.