Surely you don’t mean spam threads, do you?
I’m literally on these forums every waking moment (I wish this was an exaggeration), and no threads disappear. I honestly think it’s impossible for me to miss a post, or not see a post within 5 minutes. So I have my doubts.
Some threads do get unlisted, since the moderators need to talk to the OP; perhaps clarify their post, or something. Usually it’s a spam post from the beginning so it never gets listed back again to the public. NOONE wants to see those threads.
Genuine threads? Yeah, they never leave.
Oh the irony.
Note there are almost 4k posts. That’s a lot to print.