That "particular" law (I don't know others by now), indicates that if one person can influence a big quantity (> 3000) of the population writing something publicly in a blog, this person must be able to be monitored by the State. Also, that it is oriented to Russian speakers, and if the foreign Russian sites don't apply this law they will be blocked in Russian territory.
It seems, as somebody said in the discussion, that they are giving blog writers the same treatment as journalists. And thinking carefully, bloggers with that quantity of readers are really journalists. So, I don't see a problem with that ... the problem could be in "what" they do with the journalists in general.
The other issue is related with the Internet technology in general. Because they are controlling what the people can read in Russia even produced in another country. And here the problem is how they apply their rules, because the rules are not wrong by themselves. If what they are blocking is information about how to commit suicide, how to kill your neighbour, pornography, how to make damage to children, about difamation and these types of things, then it is a more than welcomed task; but when the facilities are there, it is very easy to jump beyond what "bad" is and to arrive to political censorship... and then we are talking about something completely different.
Anyway, each person has a different concept about "what" "good" "is".