Global or local moderators?

Global or local moderators?

Do you allow for global moderators, who have power over every subforum on your site? Or, do you only allow for local moderators, that is moderators who can moderate only one specific board at a time?

For instance a global moderator could moderate the entire forum while a local moderator would only be able to moderate just one board, such as the SEO section on an internet marketing forum.

Tell me which one is your preference.