"Due to this thread being necro'd, we've gone ahead and locked it."
"Due to the high number of threads about this topic, this one is getting locked."
So wait... Posting in old topics is frowned upon? So if a topic is "too old", you're supposed to create a new one. Yet if too many threads get created about a specific topic, it's gonna get locked anyways.
Can't tell you how many times I've gone to reply to a thread, only to stop last minute because I noticed a months-long gap between recent posts.
"Oops, I guess I'm not allowed to post here, 'cause somebody else dug it up, even though they added a unique perspective, which warrants further discussion. Nope, better to make a completely new thread. It's ok, if I want to reference ANY of the information that's already been discussed, I can post a link for people to go to that thread, read it, come back to mine, and continue the discussion. Whatever you do, don't discuss it in the old thread tho..."
It doesn't make a whole lot of sense to me. If Necro-ing is such a problem that you have to lock every thread that gets necro'd, why not just auto-lock threads after a set amount of time, and save y'all the trouble??