Modifying deleting answers

It seems that it is possible to delete or edit “replies” to a topic, but not “answers” to the first post. This is potentially an issue if a user inadvertently discloses sensitive information they would like to revoke or would otherwise like to withdraw information they have given out. In the spirit of free expression and user privacy, I think deletion of answers should be enabled if possible.

Apologies if I am wrong about this.