Interestingly enough, the 'academic network' (arnes) that covers schools etc., and also some government entities is not blocking it, but atleast two out of the three largest commercial ISP are (can't test the third, since it's locked to their customers' IPs only).

Because the russian media mafia (tacc, rt, sputnik and the like, which are all either directly state-owned or via the state-owned tv novosti) are about to be banned in all EU countries where they are still available, and the ISPs might have banned them pro-actively.