Simon,
True, but still....
...people tend to trust other (unknown) people by default (fraude and con men exploit that)
...apparently telling a story of some sort (being a victim, selling Paradise, I am a Nigerian prince...) tends to somewhat make our logic thinking be put on the back burner (when compared to stating facts without a narrative)
This makes me remember I read about a study that found that people are more willing to say yes to a request when there is a narrative or reason stated.
'Excuse me, can I please go before you at the copier, because I really need to copy this...'
yields significantly better results than just
'Excuse me, can I please go before you at the copier?'
In the first case, no more information is conveyed than in the other case. However, since a reason is explicitly stated (although obvious, why else would you be at the copier), the requestee assumes the asker already thought about it, and his own logic thinking is bypassed.
(Of course this works within limits)