The New York Police Department has demanded that Twitter  release the name of a user who threatened an attack "just like in Aurora" on the Broadway theater where Mike Tyson's one-man show is playing.
The NYPD Intelligence Division learned of the threat late Aug. 3 and used Twitter's system for emergencies to request the identity of the account holder, according to police officials.
"Twitter turned us down, so we dispatched police to cover the theater while we sought a subpoena to force Twitter to disclose the identity of the account holder," NYPD spokesman Paul Browne said in an emailed statement.
NYPD Battles Twitter for Identity of User Promising Violence 'Just like Aurora'- http://news.yahoo.com/nypd-battles-twitter-identity-user-promising-violence-just-144157398--abc-news-topstories.html 
Interesting situation! How do you feel about this? Should Twitter, or any site for that matter, be required to immediately hand over identifying information in situations such as this? If it were required that you use your real name when posting online, would it change your amount of online participation?