That is the topic, here is the abstract:
Many rumors convey information about potential danger, even when these dangers are very unlikely. In four studies, we examine whether micro-processes of cultural transmission explain the spread of threat-related information. Three studies using transmission chain protocols suggest a) that there is indeed a preference for the deliberate transmission of threat-related information over other material, b) that it is not caused by a general negativity or emotionality bias, and c) that it is not eliminated when threats are presented as very unlikely. A forced-choice study on similar material shows the same preference when participants have to select information to acquire rather than transmit. So the cultural success of threat-related material may be explained by transmission biases, rooted in evolved threat-detection and error-management systems, that affect both supply and demand of information.
The piece is by Timothy Blaine and Pascal Boyer. Of course this is one of the very best tips to know to understand what is actually happening on an Op-Ed page or your Twitter feed. See through it, yes you can.
For the pointer I thank the excellent Kevin Lewis.