Here's the opinion of someone who does actually have PTSD:
Ex-RAF serviceman Matt Neve, who has been diagnosed with PTSD, generalised anxiety disorder and depression, all attributable to his service, said:
"One of my main roles was the loading and unloading of those that had been injured or killed in order to repatriate them. Unfortunately, PTSD developed from this, a trigger of which is sudden loud noise, flashes of light or explosions, as well as certain smells."
"So imagine what it's like when these are combined in a small package set off by your neighbour. You physically shake with fear, sweat, and become so agitated that you don't know what to do. Imagine what it's like to get out your car just as a firework is set off and you grab your daughter and dive to the ground for cover because you thought you were back in a war zone. Imagine how embarrassing it is to accidentally wet yourself in front of your family, because that young idiot down the road launches fireworks at or near your house, or to be scared to leave your house in the evening in the weeks leading up to Bonfire Night and New Year."
"All of the above is what happens and has happened to me. It's a reality of living with PTSD."