Are you trolling? You asked a question ("
when you stay in the castle does that allow you to walk around the MK anytime? or are you 'confined to the castle after hours?"), have received legitimate answers (and FYI, every single response has been that you will, in fact, be confined to the castle after the park closes) but you still flat out refuse to accept it because it's not what you want to hear. Why even ask the question when you've already made up your mind about what Disney's policies actually are?
Furthermore, why would you want to spend your time "partying" into the wee hours when you have a once-in-a-lifetime opportunity to stay in the castle? I'm sure there are literally thousands of people who would have a deeper appreciation for the experience and not cause a fuss because they have a curfew.