They post, it gets deleted, and the spam bots get banned.
TheShadowbox shows up on google - that's probably where they are coming from.
Tip: don't reply to threads, ignore 'em and report them (reporting a spam bot once is enough - as it sends an email to the mods and we can delete their entire posts/threads from the user's profile. if you send 100 reports it'll spam our email inboxes).
they're caught and deleted/banned quickly, it's a temporary nuisance.