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Recent developments in ad hoc and personal networking as well as grid computing have resulted in a range of new applications. In this paper we examine one of these applications from the perspective of its potential users. During a two week field trial a group of 24 high school students were able to use the ad hoc screen sharing application based on Wireless Grids technology. Results show that although students express a general belief in new technologies, they are also reluctant to use it when it comes to their personal situation. For the further development of applications in this area this means that developers should focus on applications that run within a trusted context and/or 'hide' these applications in the lower levels of the protocol stack.