Originally Posted by
pinniped
There are OMNI threads with hundreds of thousands of posts. (Games threads, mainly.)
For legitimate travel-related news, this one might have fastest-to-5000, plus a crazy-high view count to go with it.
Probably not a record though.
Without attempting to research this, I would guess that there have been a couple very long mistake fare threads (mostly in the MR--discussion subforum), but these tend to get lots of posts quickly very early, have relatively inactive periods starting sometime after the fare is pulled, and then generate more posts near the time of the flights or when the airline tries to cancel them all.
Several years ago, there was a very long and fast paced thread in the DL forum when the MQD requirements were announced.