Suppose you have set up an array of page IDs where you don't want the breadcrumbs to be displayed.

    $ids = array( 4, 8, 15, 16, 23, 42 );

Now you just have to check if the currently displayed page (or post) has one of these IDs, and if not, display the breadcrumbs.

    if ( ! in_array( get_the_ID(), $ids ) ) {
        bcn_display();
    }

**// EDIT**  
And if you want to exclude pages only—no other (custom) posts—you could speed up the check a bit.

    if (
        ! is_page()
        || ! in_array( get_the_ID(), $ids )
    ) {
        bcn_display();
    }