Stand up to or beat the leader of the group and the others will run
If the bunny beats the alpha fox, the others will have an easy meal since the bunny will be weaken even more by the fight. Any group with a leader has at least one member who thinks he or she should be the leader. If the leader is taken out, this person will take over. Most deaths in fights not caused by weapons but by a group stomp on a person who has gone down. It real life is not a movie, in a real fight, the entire gang will attack you, not one at a time.
Only cowards run
The reason everyone knows this is because only running cowards are alive to report the fact. The brave ones are dead. Sometimes you must stay and fight, especially when you would be leaving a friend to fend on his or her own. Just remember, never run home! When the bad guys know where you live, things just get worse.
Police are there to protect you
The police are there to protect the public but can do little to help any one person. The police primarily respond to crimes that have been committed, not one in the process of being committed. For intimidation by bullies, use the police when you can, but they can do little to protect you from threats other than threaten the offender. They are unable to do much until the bully takes some action against you.