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Think before you post. You might not be aware of how much information you’re {{U}} (47) {{/U}}.
That’s the message from the founders of Please Rob Me, a website launched last week that {{U}} (48) {{/U}} just how easy it is to rob people blind on the basis of the information they’re posting on the Web. The site uses streams of data from Foursquare, a(n) {{U}} (49) {{/U}} popular location-based social network that is based on a game-like premise (前提). Players use smart phones or laptops to "check in" to a location, {{U}} (50) {{/U}} their position on a map for friends using the service to see. The more often you check in, the better your chances of being declared the mayor of a {{U}} (51) {{/U}} location, be it a restaurant, bar, office or even your own home.
The problem comes when users also post these locations to Twitter, says Boy van Amstel, one of the founders of Please Rob Me. Then the information beco

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