<p>Questions and other posts are not removed when your account is deleted <a href="http://meta.stackexchange.com/questions/5221/how-does-deleting-work-what-can-cause-a-post-to-be-deleted-and-what-does-that/5222#5222">unless they score less than 0</a>.</p>

<p>Questions may be deleted by the Original Poster before upvoted answers are posted.<br>
Once a Question has upvoted answers it's generally considered Community Property (per the license linked at the bottom of every page). So it can't be deleted.</p>

<p>Under unusual circumstance we can delete whole questions or redact parts thereof.</p>