Agent: facebookexternalhit/1.1 externalhit_uatext.php In Web Logs

Many of my clients and business friends have asked my expert opinion on some "Facebook related thing" in their website logs. They were worried it might be a spammer, hacker or something with ill intent. They say something like this in their web logs: Agent: facebookexternalhit/1.1 (+http://www.facebook.com/externalhit_uatext.php) This is the...

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