I'm with The Bushranger. New visitors to these webcomics/board might like to see these discussions, especially if external links point to them.
If you're growing short on space and there's tons of completely useless stuff, I'd say make a judgement call and delete some, otherwise, why not keep?
Also, what's the difference between the latter two choices in the poll? *scratches head*
Reducing the size of the board is my major concern. As most forums here are years old (and even years inactive). Due to forum moderators going AWOL and not saying what to do with the information. In that light I've locked all non-active forums that do not have mods due to spammers causing issues in the past.
As far as the categories above. Registered users are users that have posted x valid/approved posts (I'm not going to release how many posts that is due to spammers trying to spam the forum). Newly Registered Users have not yet posted x valid/approved posts and therefore cannot post without moderation. You, fell into this category.