When you are playing Assassin’s Creed III, you are bound to encounter Vigilantes at some point or at least you will notice them marked on your map. As you try to interact with Vigilantes, nothing really happens, and thus their purpose remains unclear. So what on earth Vigilantes in Assassin’s Creed III do? What are they for?
It is not possible to recruit Vigilantes or interact with them in a similar way. Their only purpose in the game is to help you out when you are being chased. If you find yourself in a situation when you can’t escape from someone, ask Vigilantes for help. These guys will stop your pursuer and hold him down, after this it’s up to you - either kill your enemy, since he’s now helpless in the hands of Vigilantes or flee the area without delays.
If it’s a large group of people who are after you, Vigilantes may not be a big help. However, they would still try and stop somebody. So the amount of enemies that are on you would be lessened.