Within a few years, you're going to wake up and grow up. You're going to regret all that you have posted and be ashamed of it. And being on the internet, it will never be erased, and it will always be remembered by those who have read it. And you'll live on knowing that.
I'm not saying it as a threat, as an insult, or what-not. I speak it from experience. It's a warning, or possibly a handed-down prediction.
Be careful of what you say or do, experience more and learn more. Keep an open mind. Do not speak when you have little knowledge or understanding as to what others are saying. If you find many people disagreeing with you, it's most likely you who's ignorant. Listen and learn before you speak. Or your back will be heavy with all your mistakes and past-weaknesses.