Those who live as a "Sheepdog" prepare for these encounters by equipping and training themselves and remaining ever vigilant so they can meet the evildoer with overwhelming violence of their own. The Sheepdog chooses not to get PTSD but to give it.
Don't be a victim, be a PTSD carrier.
Maybe if we still called it “Shell Shock” instead of PTSD, people would get the help they need.