A relevant paper for my current research: Consolvo, S., Smith, I., Matthews, T., Lamarca, A., Tabert, J., and Powledge, P. (2005). Location disclosure to social relations: why, when and what people want to share. In Proceeding of the SIGCHI conference on Human factors in computing systems, pages 81–90, Portland, Oregon, USA. ACM press: NY. Available from: http://guir.berkeley.edu/pubs/chi2005/p486-consolvo.pdf.

Advances in location-enhanced technology are making it easier for us to be located by others. These new technologies present a difficult privacy tradeoff, as disclosing one's location to another person or service could be risky, yet valuable. To explore whether and what users are willing to disclose about their location to social relations, we conducted a three-phased formative study. Our results show that the most important factors were who was requesting, why the requester wanted the participant's location, and what level of detail would be most useful to the requester. After determining these, participants were typically willing to disclose either the most useful detail or nothing about their location. From our findings, we reflect on the decision process for location disclosure. With these results, we hope to influence the design of future location-enhanced applications and services