I cannot delete my own question on Stack Overflow. When I try, I get the following error message:
Sorry, this question cannot be deleted: too many existing answers, or upvoted/accepted answers (click on this box to dismiss).
Basically you can't. If you've asked a question and others have contributed answers which have been deemed valuable by the community, you can't delete the question because that would delete those valuable answers too.
Why do you want to delete the question? Maybe there's a better alternative, such as editing it to make it more useful.
When it's not possible to have your question deleted, you can always ask for it to be unlinked from your account, so that it won't have your name under it.
This isn't obvious, and isn't usually suggested in response to the "Please delete my question" requests, so I thought it's worth posting this for those who come here via web search.