RT @IWantPrivacy:Widespread Violation of Privacy Settings in the
Twitter Social Network 

Twitter is a social network that focuses on creating and sharing short
140 character messages know as tweets. Twitter's sole privacy policy
is a binary option that either allows every message a user creates to
be publicly available, or allows only a user's followers to see posted
messages. As the Twitter community grew, conventions organically
formed that allow for rich expressiveness with only 140
characters. Repeating what someone else says is called retweeting;
this behavior facilitates the spread of information and commentary in
real-time.  We have performed a large-scale collection of data from
the Twitter social network by means of the publicly available
application programming interface (API) they provide. Our data set
contains over 2.7 billion messages, 80 million user profiles, and a
2.6 billion edge social network. We analyze these data and uncover the
growing trend where users defeat Twitter's simple privacy mechanism of
"protecting one's tweets" by simply retweeting a protected tweet.  We
have shown through quantitative and qualitative analysis that these
privacy-violating retweets are a growing problem.  More than 4.42
million tweets exist in our corpus that expose protected
information. As Twitter gains popularity over time, we see an
increasing trend in the number of privacy-violating retweets. Although
there are many users who are unaware that their private tweets are
being broadcast to the public, there are some who are aware of this
problem.