We take suggestions seriously and evaluate them, but they don't always 'fit' with the personality of and vision for these forums. The spam forum idea is one of these. We want to encourage discussion rather than spam, so a spam forum is not a good fit here.
For the modding forums--even if they're inactive, there are people who still visit them and end up making mods at home even if they don't post there, so the knowledge is invaluable. Some of the tutorial threads in the modding section of the Kotor forum have no posts, but that's because the staff there decided it'd be better to limit the thread to a read-only format.
What sections were you thinking needed merging?