For a limited time you can delete a post by pressing the edit button at the bottom right. After a couple of months or so you can't. This comes in handy if you frequently post while drinking.
You can delete a thread you started in the classifieds by using the thread tools at the upper right of the first post but I don't think you can do it anywhere else without contacting a moderator/admin, one of which will probably come along and move this to forum usage issues. Unless this is some sort of a gig joke that went over my head.
Vakmere's post may belong in forum usage humor.