I've had a similar situation, and my judgement turned out to be correct. I don't think it was PL related. Just because some person was a dangerous individual the last time around doesn't mean they will be everytime around. To me, this is sometimes a present life thing. It could be a psychic glimpse. On the other hand, it could be intuition based on very subtle clues that our subconscious minds notice, but we don't consciously recognize. But in the rare instances when it happens, I try to listen a bit closer now. The first time, I tried to argue with it, but couldn't shake the feeling....and then it turned out, the feeling or knowing, was right. I don't normally feel an automatic dislike for people, but when I do, I go on guard until I can get to know them better. I'm not going to assume it's definitely an accurate idea of who they are, and I don't want to treat anyone badly because of it, but I am more cautious. If you get bad feelings about people, and everything tells you that you are incorrect and this person is actually a great individual, it could be PL related, but sometimes it's just the plain truth, and somehow you know it. Whether God shows you, or whether you have good inner radar about these things, etc., sometimes, we just know, and we don't know how we know.