“So the proprietor of the Huffington Post has decided to ban anonymous commenting from the site. It seems like common sense [that people will behave better]. Whether it is supported by evidence is uncertain. The most striking study I’ve come across is the experiment conducted by the (South) Korea Communications Commission from July 2007. From that month onwards, anyone wanting to comment on any of the 146 Korean websites with more than 100,000 members was required by law to submit resident registration or credit card details. The hypothesis behind the requirement was that people would behave better online if they were easily identifiable. But it didn’t turn out that way.
http://www.rawstory.com/rs/2013/08/25/banish-the-trolls-but-web-debate-needs-anonymity/