Dr Phil's "Evil Eight" (avoid people with these characteristics):

1. Arrogant entitlement-they think they can get away with anything they do.
2. Lack empathy
3. No remorse/guilt
4. Irresponsible/self-destructive
5. Thrive on drama
6. Brag about outsmarting.
7. Short-term relationships.
8. Fantasy world/delusional.

His "Nefarious 15” tactics that these people use to get to you and me and everybody else they target:
1. Infiltrate your life.
2. Create conspiratorial confidants.
3. Depend on approval.
4. Build a file.
5. Misdirect and obfuscate.
6. Blame others.
7. Lie.
8. Frauds/cheaters.
9. Isolate victims.
10. Abuse authority.
11. Press hot buttons.
12. Revisionist historian.
13. Two-faced/gossip.
14. Paranoid.
15. Passive aggressive.