What ?!
IdolFun, you make more work for yourself and the other mods. Tell him how to do it.
1) Click on 'Edit' in the lower right of your post.
2) Click on 'Go Advanced'.
3) Check the 'Delete Message' radio button.
4) Give a reason for deletion.
5) Click the 'Delete this Message' button.
I've done it in the past (long time ago), but perhaps recent system modifications have stepped on that capability. In the past, if you were a thread starter and you deleted your post #1, the whole thread would disappear, including other member's replies.