Board Thread:Help desk/@comment-24549654-20140216143038/@comment-25075055-20140228144236

If you think the thread should be deleted, just click on the More button next to the opening post and click Remove. Provide a reason (you can optionally notify all admins) and the thread will be deleted. Users who still have the url can access the deleted thread and potentially restore the thread though.

Personally, I think the thread should just be closed, rather than deleted. You can contact an admin to close a thread.