Ok, I apologize for trying to help. Is that what you want? You asked for ideas on managing your anger. I tried to share one. Did you mean to ask for people to feed your anger by telling you it was all her fault and she is probably evil and out to get you and you are blameless because you have PTSD?

Do you feel better when you go on the attack and make the situation worse? If it's working for you, okay. I'm willing to bet that it isn't.

What if you found out that the greeter has PTSD too? Then is the way that she acted okay? Would you no longer be angry?

Yes, PTSD changes your thresholds for feeling like you are under attack or being threatened. You probably do get angry more easily than you would have before experiencing trauma. You still have a choice regarding how you respond and how you think about the world and other people. PTSD robs you of perceived power and control. But you can take it back if you choose to. At least power and control over your own thoughts, feelings, and actions.