Sometimes people who reveal government secrets can lay themselves open to the accusation that they have put the lives of spies employed by their government at risk.

But that doesn't apply in the case of Snowden. He has revealed activities carried out by a government agancy which would appear to be in breach of the US Constitution and of the laws of friendly countries.

And for that he faces Draconian punishment, if the US government can lay their hands on him, and hysterical attacks such as that Bobert just made.

I note that even in the US only a minority of people think what he did was wrong, with almost as large a minority thinking he was right, and about one in three undecided. Elsewhere it seems evident support for his actions is a lot higher.