It's sad to hear how many people have had really negative reactions from revealing their ptsd. Ithink I've been fairly lucky in terms of poodle that mean alot to me, though I've had mixed responses about it. Some people make an effort to understand. My wife tends to walk on eggshells at times, but mostly because I've traumatized her through some of my reactions. We are working on that though... my family doesn't really make an effort to overtly understand it, but they also don't do anything to ridicule me or make me uncomfortable around it.
I don't tell many people, though I try to remember to let medical professionals in on it because this situations can sometimes trigger flashbacks. I've told some coworkers because we were talking about mental health stuff. Some seemed to take it better than others. One immediately jumped to the conclusion that it was from being in the military, though nodded when I told her it was from "something else"...