How do I delete a thread?
Conventional way has been that you can't, but with the new Forum system you can really mess it up by deleting your own posts (please don't do this, I'm not recommending it and other forum members will take a dislike to you). This happened with that "I found Raxxla" thread.
You could ask a mod to close it, by typing "Mods please close thread" but that isn't always noticed, so it is best to make a request in the Report (bottom left).
Evidently, it is possible to change thread titles, so you could add something to it, such as [closure pending], but I don't know if the mods are OK with that.
The real conclusion to take away from this is to be careful what you type - it seldom gets deleted, just closed, and is on record forever !