Hi Lavish,
Do you have akismet enabled? Some of the spams will be handled by it. Also, I do recommend limit activity posting rate(We have a plugin for that). Setting the limit to say 3 posts per minute is not going to affect normal users but will be a preventing some spam.

There are other measures too like using certain parameters( age of registration, no. of friends etc) that can be used but it all depends on the target site. On BuddyDev, we had a lot of message/mention spam, so we disabled mention for non friends(only admins can be mentioned if not friends) and did a few more things to make spammers effort meaningless.

I will suggest first thinking about some criteria and then writing code to make all users adhere to the criteria.

Sure. I will post the code/tutorial in a day 🙂

Hi Lavish,

Try the following code in your bp-custom.php file and let me know if it works or not.

add_filter( 'bp_activity_at_name_do_notifications', 'buddydev_disable_bulk_public_message', 10, 4 );
function buddydev_disable_bulk_public_message( $do_disable, $usernames, $user_id, $activity ) {

	//if the logged in or the mentioned user is super admin, let the message go, else not
	if ( is_super_admin() || is_super_admin( $user_id ) ) {
		return $do_disable;
	} elseif ( function_exists( 'friends_check_friendship' ) && friends_check_friendship( $user_id, bp_loggedin_user_id() ) ) {
		return $do_disable;
	}

	return false;
}

Thank You
Ravi

Hi Lavish,
Most probably you tested it while you were logged in as admin. Please try testing it with normal user accounts.

Admins can mention anyone.