Get the intimidation perk. Pacify at least a couple of raiders. Pickpocket their weapons from them. Then command them to fight. You also have to pick up loose weapons lying around or they'll pick them up. I did this and one raider ran and got a pool-que that I missed, but this badass female raider kicked his ass and finished him by breaking his neck. I was awe-struck. I know, cool story, but true.

this... this is why I knew getting high charisma would be amazing in this game.

lol yea I posted about it a while back. Setting up death matches is fun

For those that are too lazy to pickpocket the weapons, if you're on a pc, you can go into the console, click on the NPC, and type "inv" to see their inventory. Then "removeitem itemID" to disarm them.

This sounds incredibly entertaining. I haven't invested in any of these perks yet, but I will be at some point.

Brawling is not very civilized, isn't it? They should have ripped open their bellies with knives. Maybe I could let some knives in the location?

I didn't try that, but it should work. They'll pick up any weapons lying around the immediate vicinity if they are unarmed.