What does it, then?
I'm not being facetious, I'm honestly asking.
( Captain Wow currently being a cunt in Infamous, Wed 17 Jun 2009, 12:24, archived)

The right to free speech comes with an implicit resposibility to use it responsibly
as it is a human right. The same as the right to free action doesn't give you the right to kill another human, because it affects others.

You can't incite racial hatred then bang on about the right to free speech. Basically, you lost the "responsible human" right to free speech the second you stopped being a "responsible human"
( the mighty badger Aphrodite, on a bar stool, by your side, Wed 17 Jun 2009, 12:33, archived)

The right to hold and express political and religious opinions
that don't cause material harm to or restrict the liberty of others.

It's complicated because you can of course argue for a change in the laws themselves to alter the definitions used above - you can argue for a change in the law to enforce mandatory deportation, but not tell your supporters to kidnap and deport people, for example.

You can't walk into a police station and confess to a murder and then claim at the trial you were just expressing free speech. You can't shout "fire" and cause a stampede in which people get injured and die.
( Flapjack I spay a little mare for you, Wed 17 Jun 2009, 12:34, archived)