And that's proably the difference between a gang and a group (my terms). A group will have a leader - they're bullying because the leader is bullying. A gang has a mutual purpose, and may be harder to find a leader in.I would be careful about focusing too much on the leader for dealing with a group attack. A pack of equals will make it almost impossible to identify a leader if one exists at all. Groups like this are highly functional and dangerous. They also tend to have a goal that isn't dependent on a leader.