[citation][nom]Vatharian[/nom][citation]Well, I fail captcha 8 times out 10...[/citation]
But you probably don't need to post a new comment after 2 minutes, and by this I mean in all of Tom's, not one thread, so, the second comment from the same account could, one bit, slow down. For the rest, spammers evolve, and AI can not simply find which button to click, but soon even read captcha better than humans.
I would suggest the human input in detecting spam and hiding it from view prior to being deleted by moderators could be reached by the current system at Tom's with a minor modification, such as "4 to 10 votes from people already with a badge for reporting some forum contents to the moderators would make the post automatically hidden", and spam is not a mater of saying something stupid as for the thumbs up/down that some people might have different ideas so it could work fast enough. And also spammers would need to be reporting correctly for a while to be able to mess up the system. And if they do, if they actually manage to get a proper badge for "fight against spam", and then falsely report comments as spam, their account would be deleted, while the actual comment would be saved from their "hidden" status and restored to normal.