The Mods can't delete Threads - so we Lock them. Unless David goes around then looking at each Thread and wondering whether to delete it it won't happen - and that would defeat the object of having Mods which is to save David a Job.
A Knight is sworn to Honour. His heart knows only Virtue. His blade defends the helpless. His might upholds the Weak. His word speaks only truth. His wrath undoes the Wicked.