Give it two or three presidencies, and it could very well be an actual thing that happens here. You don't have to disappear a lot of people, just enough to get the word out. Putin doesn't have to kill a lot of people with polonium-210, just one or two public cases does the trick.
The future looks obvious: don't fight the state, don't disagree with the state, or else. It's a fascism model, very similar to what Russia currently has (how ironic is that end result?!?). We have the widening rich / poor issue and oligarch class to go with it (which is very common under highly industrialized fascist nations).
dont worry, the legal frameworks are in place for that to start happening too.