gistfile1.aw

<?php

function foo_remove_bbp_for_subscribers()
{
  if( !current_user_can('subscriber') )
    return false;

  if( !class_exists('BBP_Admin') )
    return false;

  global $bbp;
  remove_action( 'admin_menu', array( $bbp, 'admin_menus' ) );
}
add_action( 'init', 'foo_remove_bbp_for_subscribers' );