I would play in a setting dominated by an oppressive, discriminatory regime, as long as there was opportunity to oppose or escape it. That is to say, assuming the government is powerful, but not truly unavoidable or unassailable. Frankly, no authority in a D&D world should be literally all-powerful. In principle, I don't mind exploring mature issues in a game.The government is all powerful and enforces the following.
I saw that angle. It doesn't negate the validity of the question, regardless of what the OP's intent was. People do actually have these kinds of propositions for their games some times.There's a depressing number of people who aren't catching onto the parody and think this is legit.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.