BuddyPress.org

As Boone hinted in his earlier post, these hooks can be used by plugins to add functionality to Buddypress.

For example, the Buddypress Humanity plugin uses the do_action( ‘bp_before_registration_submit_buttons’) hook, also found in register.php, to add an additional field that must contain text matching a site-admin-defined value from the database to validate the registration process, and allow the signer-upper to continue to the next step.