All the KNF and all the GMG could get sanctioned for it. KNF isn't allowed to attack Kusari civilians, and the GMG can't participate in unlawful actions.
I doubt it'll happen, but rulewise you're all in the wrong. Even if all consenting parties agree, it's against the ID which makes it rule-wise illegal... which is why I hate the way the system works now - it places higher weight on arbitrary rules created for the sole purpose of preventing people from doing things than on good rp, designed to help people do things.