The recent OOT spammers were a total of 5 accounts which each posted a few dozen topics one right after the other, each slightly altered to escape the duplicate thread catcher. Unless we implemented captcha on every post, which would instantly kill the forum dead, captcha would have had almost no effect We do need to figure out a way to move those threads elsewhere without leaving a "thread moved" placeholder. Necropost killer will send it back in time to it's origin, but it won't remove it from the page entirely.
Yes, we have a time machine.