bbp_is_user_active( int $user_id )

function bbp_is_user_active( $user_id = 0 ) {

	// Default to current user
	if ( empty( $user_id ) && is_user_logged_in() )
		$user_id = bbp_get_current_user_id();

	// No user to check
	if ( empty( $user_id ) )
		return false;

	// Check spam
	if ( bbp_is_user_spammer( $user_id ) )
		return false;

	// Check deleted
	if ( bbp_is_user_deleted( $user_id ) )
		return false;

	// Assume true if not spam or deleted
	return true;
}