George, the fact that your daughter-in-law raised the question with you should be some reassurance. It shows that she has enough security awareness not to accept requests from all and sundry. In the short time that I've been on facebook I've been surprised at how many people put a lot of their personal details on display, making easy targets for identity fraud I would think. An example is birthdates - it may be nice to receive birthday greetings from FB friends but ones profile doesn't need to include the year for that to happen.
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