In the past few months I've noticed an increase in spam-bots on my forum. At first it was only one or two a month, but recently there have been five or more each week. My moderators and I have been attempting to ban each by IP, however I know from experience that botters/spammers can easily get around this. Is there a more effective way to filter them out within the Admin CP? I've been looking around but I couldn't find anything other than the CAPTCHA which has been enabled since I started the board.