ops, Yes I can not delete it. I did not really know it. It is a new feature?
Below is the post made by theymos 9 years ago. So I assume that deleting topics has never been possible.
Deleting a topic deletes all of its replies, but topic starters have no ownership over replies to their topics, so it is not acceptable to allow topic starters to delete their topics.
Other versions of the SMF platform that this forum uses have the ability for topic starters to delete their threads so it must be something that was tweaked (one of many such adjustments to this forum) Having said that, the mods are still able to delete threads and "Nuke" users whereby their whole posting history is wiped. If a user had created a mega thread and then was nuked, hundreds (and perhaps thousands) of posts could be wiped.
If the delete thread via delete post feature were still enabled and a hacker gained access to a mega thread, they could have the potential to delete thousands of posts with one click, but, as I said before, that "feature" appears to have been quietly removed (probably for that very reason).
