In most countries, journalists don't have any special privileges. If they can do it, so can you.
US law, for instance, allows "journalists" to claim limited immunity for not giving up the name of a source. But the kicker is, there is no real definitive description of "journalist". If you, as a private individual, want to claim that you were acting "as a journalist" when you made that blog post, you can.
(This is a necessary consequence of the First Amendment, which makes it illegal for the government to pass a law saying "these are the criteria for being a journalist".)
In Russia... I don't know, but I imagine people who pull this kind of stunt when the Kremliin doesn't want them to, are running considerable risks that have nothing to do with the courts.