I occasionally run across people who seem overly suspicious, and too willing to see me as some sort of con man, right from the moment they meet me. Whenever I meet someone like this, I think, aha, they've had some experience with a sociopath.
People who've been burned are smart to keep their guard up, but it's possible to keep your guard too high, and screen out a lot of non-sociopaths as well. And if you're on the receiving end of their (in your case unjustified) suspicion, it's hard not to be resentful about essentially being accused of being a sociopath yourself.
I exchanged emails recently with someone who had been burned (badly) by a sociopath. She didn't accuse me of being one, but she did wonder aloud what she was doing, after her earlier experience, telling her story to a complete stranger (me).
I responded, "I suppose an incredibly clever sociopath could conceivably write a blog which talked about how to see through sociopaths, just in order to lure in victims. But the odds of that would be awfully slim. And sociopaths generally don't satisfy themselves with quiet pursuits like writing, they want to be out and about actively screwing others over."
"Remember, I could be paranoid about you as well: how do I know you're not a clever sociopath who pretends to have been a victim of a sociopath in order to pull a fast one over on a guy who thinks he knows all about them? Anyway, my guard is up, but it's not that high."
I suggest others do the same: screen out the sociopaths, but don't make your sieve so fine that you weed out a lot of non-sociopaths as well.
One of the tragedies of getting involved with a sociopath is that you have to lose your innocence, and you're never quite as trusting again.