Conceivably. The database is often corrupted for threads this old. Certainly, there are cases of posts with the poster’s name stripped off (though that doesn’t seem to have happened in this thread), and also of some posts ending up in the wrong order. I’ve never heard of posts being removed entirely, but then, that’s not necessarily something that would always be noticeable when it happens.
Look at post #10.
I think the “secret” is just that Sally has been cuckqueaned (yeah, I had to look that up). And since there was no YouTube in 1999, here’s a helpful link.