Internet, with its diverse apps, went a long way from being just a
helpful tool in many activities, to being an essential part of our lives.
Social networks (or social networking sites, abbr. SNS) are the on-
line services that became so popular, that nowadays it is hard to
imagine how would life look like without them. Emergence of
smartphones enabled constant accessibility and omnipresence of
SNS. All of this resulted in SNS being, not some “separate universe”
parallel to our real life, but inseparable part of our lives: they are
interlaced with our private life, relationship, friendships, job,
school, hobbies, everything. Social networking site Facebook (abbr.
FB), with 1.32 billion monthly active users as of June 30, 2014
(Facebook, 2014), is considered to be the largest and fastest
growing networked community on the Internet.