  Information sharing on social networks is ubiquitous, intuitive, and
occasionally accidental. However, people may be unaware of the potential
negative consequences of disclosures, such as reputational damages. Yet, people
use social networks to disclose information about themselves or others, advised
only by their own experiences and the context-invariant informed consent
mechanism. In two online experiments (N=515 and N=765), we investigated how to
aid informed sharing decisions and associate them with the potential outcomes
via notifications. Based on the measurements of sharing attitudes, our results
showed that the effectiveness of informing the users via notifications may
depend on the timing, content, and layout of the notifications, as well as on
the users' curiosity and rational cognitive style, motivating information
processing. Furthermore, positive emotions may result in disregard of important
information. We discuss the implications for user privacy and
self-presentation. We provide recommendations on privacy-supporting system
design and suggest directions for further research.
