Osokans are custom-designed to annoy Dark Siders- obviously not individually more dangerous, but unafraid of you, happy to go into melee, and very difficult to actually kill, even with a lightsabre- you drop them when you take them down but don't kill them, and then you have to waste time to actually kill one, during which time his friends are beating the heck out of you with the neurowhips.
The point being is that the only reasonable cause of action with them is to flee- it's just not worth the risk of fighting. Therefore we have a stick to beat you over the head with saying "Don't go around just killing whoever you like in the Republic else the Bureau will bring the Osokans in."
This forces you to actually think...
I'd be cautious of using them in the current rules system though Rex- I think they are still being finalised our end.