Somebody please delete this since I can't!
There is an option for this, but I am not allowed!
Users generally can't delete threads, and deleting the first post of a thread implies deleting the whole thread. Currently users can delete their other posts - as long as it doesn't get out of hand. We've have complaints on the old forum about people deleting too many posts and messing up threads. If that happens, we might only allow edits. (You could still edit your post down to nothing but people can still see that something was there which is often essential for placing the following posts in some context.)
It was a test that failed. So, please delete it!
Thanks.