What you can and can't say on social networking sites
18 November 2012 Last updated at 08:36 GMT
More and more of us are blogging and tweeting, putting our thoughts online. But do we think about the consequences?
Lord McAlpine, the Tory peer who was wrongly accused of child abuse, is said to be preparing to sue individuals who mentioned the allegations on Twitter.
And another recent court case saw a rape victim awarded damages, paid by the people who identified her online.
The situation raises an interesting debate about the right to free speech and protecting people from unjustified attacks.
Media barrister Christina Michalos and the journalist and media law consultant David Banks discuss the pitfalls and the power of social networking sites.