Modifying Events (Exclude Categories) (TEC)

function exclude_events_category( $query ) {

    if ( $query->query_vars['eventDisplay'] == 'upcoming' || $query->query_vars['eventDisplay'] == 'past' || $query->query_vars['eventDisplay'] == 'month' && $query->query_vars['post_type'] == TribeEvents::POSTTYPE && !is_tax(TribeEvents::TAXONOMY) && empty( $query->query_vars['suppress_filters'] ) ) {
        $query->set( 'tax_query', array(
            array(
                'taxonomy' => TribeEvents::TAXONOMY,
                'field' => 'slug',
                'terms' => array('2012'),
                'operator' => 'NOT IN'
                )
            )
        );
    }

    return $query;
}

add_action( 'pre_get_posts', 'exclude_events_category' );