In answer to the question; "Ever get that feeling?" Yes, I have. There are truly evil people, and there are 'evil posers'. The gut feeling you get is what helps dicern the two. Whether a level of actual possession or demonic 'control' is invoved, the presence of a truly evil soul will trip all the 'red flags' for me. When I was into New Age beliefs, I could actually see the dark aura surrounding them. Ironically, such people are to be found amongst the New Agers as well as among 'churchgoing' people. I still can sense the 'level' of evil within a person, and like Anikan Skywalker's sword changing colors, I have 'seen' (more correctly, felt), some acquaintances' souls becoming more evil. Often, they realize it, and reverse the process, but some don't notice it until reversal is all but impossible. Unless you are firmly rooted as a 'positive energy' person, when you recognize a truly evil person, your best defense is avoidance. If you are well rooted, acknowledging them as evil (it is done on a non-verbal level) and then avoiding them is advised. There is usually a 'respect' of knowing you are cognisent of them. One must be very firmly rooted before attempting spiritual warfare.