I once told someone an idea had for a story.
It was some concoction of Young Justice, Avengers and Avatar.
I had that person tell me that the exact story i told them was not mine but written by someone else. Not because of me mentioning the avengers, just the plot in general.
I started making up some crazy stuff about names and weird creatures ect.
This person told me it was 100% not my story, totally written by someone else.
On that note
The one story about someone meeting obama and talking about passionfruit with them seemed pretty unrealistic.