Sun, without going into more details, let me conclude that an automated locking system is not practical. Let us not get perturbed by off and on intrusions which can't be helped. And finally, looks don't matter as long as our intentions are clear. If the first page has nothing for you, go to the second or third or even further. Look for threads that have been posted within ten days and have not received the required attention and post a sensible response there. That should be our aim. By bringing up good threads, the locked threads or spam threads will automatically go down the pages thus giving you a good looking opening page of the index. And yes, efforts will be made, from the editor's side to lock old threads.
On that note, I am locking this thread. No more, no less.
Please note that fresh threads or responses on this point will not be encouraged.
'Mastering others is strength. Mastering yourself is true power'. -Lao Tzu