Well, it is only shows how data mining works
Details from 100 million Facebook profiles posted online Why it happened? 1. The user did not lock/secure their info? Maybe. 2. The user really allow sharing their info? Possible since it’s called sharing and they want it shared. Their choice. 3. They know what is FB for and they know the catch? Maybe or No. You know… not every user reads privacy agreements/terms/policies. What’s the catch? Data mining. Profilers/Scammers/Thieves has easy targets. Yours is theirs. Theirs is theirs.