Zelot, you have to remember that the GMG supports the Blood Dragons secretly. They don't advertise to everyone "hey, we fund the Blood Dragons!"
If so, they would have leverage against the Outcasts. However, in my opinion, the Outcast/Blood Dragon relationship should be neutral now. But that's another discussion.
I would think the KSP pilots would "ignore" certain commodities in a Hogosha ship. However, i don't think they would allow GMG pilots to be hauled around. Perhaps they could be "bribed" by the Hogosha pilot, but they wouldn't automatically avert their attention because of Samura's control.