Have you considered requiring posters to apply at least one of the main five tags before their post can go up? This could reduce mod overhead and get people more involved in their own tagging. However, it is a small barrier to posting.
If you did this, it would probably be wise to display the main five tags by default instead of just putting them in the search box, or having the search box automatically recommend the main five tags in the drop-down before you search anything.
Have you considered requiring posters to apply at least one of the main five tags before their post can go up? This could reduce mod overhead and get people more involved in their own tagging. However, it is a small barrier to posting.
If you did this, it would probably be wise to display the main five tags by default instead of just putting them in the search box, or having the search box automatically recommend the main five tags in the drop-down before you search anything.
Given that everybody can tag everyone’s posts there doesn’t seem to be a problem of mod overhead.