<p>I don’t know if you’re kidding or serious. I’m going to assume the latter. ED is binding. There is no waiting around to see who else might accept you. You signed an agreement that you would attend if accepted and would withdraw any outstanding applications. If you do not adhere to this, you not only risk having your JHU acceptance reversed, but you will likely be blacklisted at any other school you apply to. Yes, withdraw them now - unless the consequences sound like fun to you. </p>
<p>Gaming the ED system like you are suggesting is not only frowned upon by most people here, it will put you in lots of hot water if you decide to keep it going. </p>
<p>Your stats and bio tell me you think quite highly of yourself and regret not applying to Harvard. Good luck.</p>