Just to be clear - I have no problem with researchers stating the results of their research, and scientists advising the government clearly have to be able to do so.
Where I'm coming from is that I saw a bunch of headlines on one day, where David Nutt was attacking the government over their drugs policy and accusing them of devaluing and distorting the evidence, followed by the unsurprising headline the next day that he had been sacked.
Now, had his lecture been a simple statement of the facts, he'd have been fine. Stating his own preferred classification? Not a problem. But as soon as you start publically criticising your employer (no matter what kind of employment it is, paid, unpaid, consultancy or permanent) you are basically making it impossible to have a good working environment. If you are correct to criticise them then you'll have to do it from the outside. There are exceptions to this (criticising awful working conditions which management refuses to correct) - but this doesn't sound like one of those times to me.
Now, I'm sadly failing to find out what, exactly, he did say. All the sentences I can find simply quote fractions of sentences, which is bugger all use.
Anyone able to find a decent quote for me?