Question 1:  “If you get a 'bad' feeling about an interaction with someone, how can you tell if this bad feeling is just from the past coloring your perception of the present or a real intuitive warning that this person is not trustworthy and out to harm you?”  
 
This is not a simple question or one that can be answered quickly.

Remember Step 2? Step 2 says, unequivocally: It is about me. Any and all feelings are chosen by me and 'by me' I mean the 'self' I made up, a belief in other words. So the bad feeling may be chosen by a belief that I deserve to be punished for example and I see the 'punisher' in this person. Or it could mean that have done what I suspect this person 

There’s an inherent contradiction when it comes to doing spiritual work. If the answer lies within, then why travel somewhere else to find it? Simply meditate on the question, “Who am I,” and all will be revealed.
But what fun is that?
And how do I cultivate the humility, discipline and willingness to go within and heal in the first place?
The answer can sometimes be simple, by sharing the process with others.

Dear Friends,
We just completed three weeks of workshops in the South of France at Les Labadous, our home away from home. The workshops were, as always, incredibly effective and many a breakthrough was witnessed.
For this message, however, I want to talk a little about how my perception chooses my experience. This is, of course, a well known concept and one we teach consistently. Circumstances have nothing to do with my experience, my choice does.
Charlie and I took a few days between workshops and drove to the Mediterranean Coast