Oldest are from 2006, I believe.
. . .
Yes, as far as I know this is the first thread posted when the site went live after testing:
https://www.fluther.com/1/whats-so-special-about-salt-and-pepper/
Spammers often land on very old threads, such as from 2011, probably because they got a search hit and paid no attention to how old they were. They’ll answer a nine-year-old question as if the OP were still breathlessly waiting to know what his dream meant. So apparently they just stay up permanently if they’re not modded away.
Some, however, such as that one, are archived, so no more comments can be posted.