What do you do when you find yourself in a situation where you're suddenly surrounded by people looking for help or attention?

Why do some people get so angry when you won't give them your first name on a call, and how should you deal with it?
How can you support an INFJ in social situations where they might feel anxious or overwhelmed?
Am I obligated to care about world issues even though I just want to live my life? Does it invalidate others?