Note that we already support this exact thing when it's about cookies! Site says: "do you want to enable tracking?" and HN says "why should every site ask me?

Note that we already support this exact thing when it's about cookies! Site says: "do you want to enable tracking?" and HN says "why should every site ask me? Can't this be a header or something?" Site says: "do you want to enable adult content?" and government says "why should every site ask you? Can't this be a header or something?" and HN says "OMG TOTALITARIANISM"