Isn't this frowned upon?
How about a Statute of Limitations on double-posts? jpoulos just posted a link that turns out to be a double-post from something from April 2000. Sure, he should have done the search, but is there a point where something has slipped out of our collective conscious long enough that it can be seen afresh?
What if Matt freezed users at 10k? Would it help calm things down a bit?