If you find that offensive, maybe you should make an effort to clear your cached thoughts[0], and recompute everything you think about prisons. If you haven't done this at least once in your life, it's probable that you have a thought in your cache that was just inserted there by some authority figure while you were young enough not to know better.
"It was as if the human brain had a blind spot, and someone had written on it in permanent ink, 'Kings. What a good idea.'"
I believe it's from the Discworld book Guards! Guards!； I always loved that imagery.
You misunderstand, and from there you argue based on your misunderstanding. No one is saying that just because you agree with a certain "law it means [your] morality is dictated by the state.", rather, your morality just happens to overlap with the state, meaning you are past that stage of moral development (at least regarding that particular issue).
Also, your claim of offense and then your sarcastic apology don't do anything to further the conversation, avoid such rhetorical sub-tactics in the future.