Update on how libraries handle law enforcement attempts at seizing public computers. Just saw this article from the middle of July:
Library confrontation points up privacy dilemma
http://ap.google.com/article/ALeqM5gkUL0PQ5iLMW7yLj_sBdm3dbK1ewD9212FL00

You could share both of these articles with staff as case studies, and start discussion about how your library policies dictate that you handle such technology requests.