If you're as angry about Alan Johnson's sacking of Prof David Nutt from the ACMD as I am, you could do a lot worse than signing this petition and passing it on.

You might think that these petitions rarely go places, but there's a chance to catch the popular zeitgeist here if thousands and thousands of people pile on.

It's really important that scientists are able to express their reasoned scientific opinion in public even if they do work for the government, and attempting to gag them in this way is unacceptable. Stand up for rational debate in this country! Sign the petition!