Vainglorious Coward writes: An internet troll who posted videos and messages mocking the deaths of teenagers, including a girl hit by a train, has been jailed. Unemployed Sean Duffy targeted Facebook tribute pages and posted videos on YouTube taunting the dead and their families. Jailing him for 18 weeks, the chair of the bench told him: "You have caused untold distress to already grieving friends and family. The offences are so serious only a custodial sentence could be justified." Duffy was also given a five-year antisocial behaviour order to prohibit him from creating and accessing social network sites including Facebook, Twitter, YouTube, Bebo and Myspace. He will also have to inform police of any phone he has or buys that comes with internet access.