Of course this assumes things happen in a vacuum, but in reality people don't really justify violence by reading a thing as much as they confirm and reinforce pre-existing ideas they have. In which case all you've managed to do is to give power to already too powerful people (government) for silencing thoughts they disagree with.
Also FWIW i disagree with the notion that trying to restrict the ways people talk and think has anything to do with freedom. And consider that your thoughts about 1984 might also be your inability to see yourself being wrong (i mean if you cannot consider yourself being wrong in this case and since what you consider a good solution is shown as a bad one in 1984, then you consider 1984 to be bad instead of your solution).