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Would you give a complete stranger your email address and date of birth? How about personal information about your friends?

If results of a new study on Facebook user behavior is any indication, around half of us would answer "yes" to those questions, depending on how old we are. The study also shows that Facebook users are becoming more lax with protecting their personal data than they were three years ago. What do these results signify in light of recent concerns about user privacy on the world's largest social network? And now that some user data will be indexed by Google, will users have to adjust what information they share?

Last week's flurry of Twitter DM spam from hacked or phished accounts wasn't the first instance of that and won't be the last.

As long as people are willing to trust their Twitter log-in information to third parties - and don't look carefully at URLs before they log into websites - and as long as a small number of bad actors want to pee in the social media swimming pool, this kind of thing will continue happening.