seldom: you are being ridiculous. Do you think if you block any Russian, they will go and speak up against Putin and risk death in a Gulag so they can continue to play here? Are you living under a rock?
If Putin plays here, or one of his top aides, sure, block them. But the millions of Russians outside his direct contacts know very little about the war and have very little chance to do anything against it.

You should learn the value of the free speech you enjoy, and start using your brain.