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But Galperin said Wednesday’s incident also illustrates a general concern about Internet privacy. Essentially, she said, if you share information or a photo with your social network, people in your network have the ability to share that with whomever else they choose.

The mobile photo-sharing service Instagram, which is owned by Facebook Inc., had to answer to backlash to privacy concerns recently when new terms of service suggested user photos could be used in advertisements. The company later said it would remove the questionable language.

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Manuel Valdes can be reached at http://twitter.com/ByManuelValdes.