I think the first thing is, AVOID them, and reserve the right to do so.I saw this thread and read earlier posts on it. I to am a people pleaser. I have defined myself this way for a very long time. I've learned to say "no" in many circumstances. It is hardest when I am certain that saying no, or not saying what the person wants to hear is going to make them angry.
This is one of my biggest struggles. Does anybody reading this have ways that they deflect the anger of someone else without turning it inward?
Keep your senses open for it, an angry person is easy to spot from a distance.
Then, just avoid that person; even if they try to talk to you, they have no legal or other right to stop you.
The best (only) way to win with an angry abusive person, is to avoid them
Also, don't be a hero and feel that you "have to" deal with them; if you sense trouble; before I was diagnosed with CPTSD, I used to give myself a lot of grief for not "handling it in a healthy way" or "standing up for myself" etc, and all the other things people try to push on you. But the fact is that it's simply a no-win situation to deal with abusive people, and nobody has any right to tell you that you "have" to or "should." Those preachy snits have no clue what PTSD is like, and usually they don't care either, they just blame the victim. (My brother even tells me that it's "self-inflicted," when he was a partial cause of it).