John Kampfner: Sites such as Sickipedia may encourage offensive behaviour, but this should not an be issue for the law
John Kampfner: The best response to cruel, offensive or disgusting tweets, like the one about Tom Daley's father, is simply to ignore them
Experts call for initiative to educate public about ease with which tweets can end with jail sentence. By Lisa O'Carroll
Editorial: A tweeter's right to make a fool of themselves must be defended to the death
Man prosecuted for 'Twitter joke' about blowing up Robin Hood airport 'bitterly upset' at decision
