well usually u don't need to explain why some thread was closed (like spam and stuff) but ofcourse if u think that u need to tell why the thread was closed then I have nothing against u doing so. But other posts in a locked thread (like commenting in a reply made) is something I don't like, since we can't reply anymore. A closed thread means that the discussion is over, so IMO no one should continue posting once the thread is closed. (excluding the times when u tell why u closed the thread)
i totally agree w/the that, infact David does'nt like it when reply's are continued in a locked thread cause it keeps at the top of the page. i do agree w/the reason the thread was locked because some do deserve a reason for the lock, but if it's a spammer..there won't be a reason.