On the subject of spammers, the guitar forum I own and administer has something called a "post flood safety check" that makes it so that people can't post more than one post per minute (except the admin and moderators). We never have problems with the kind of spamming that can clog up a forum. We only get about one piece of spam every few months, and it's always from someone who is promoting either their own music or someone else's music. We only allow members to post in the guitar forum, but that's not because of spammers. If Tweedsblues had something like that, it might not be necessary to require membership for posting.