So I finally friggin got to play some more Black Crusade (or well, playing ANYTHING at all made me happy in the extreme)… and what I got to play was a very fun Thousand Son sorcerer. Anyway, upon being asked what our next step should be (following being evac'd off a world that had a successful chaos revolution as the intro -- which was then promptly exterminatus'd), my char, after expressing disdain for leaving others to burn, proposed we journey to a new imperial planet, pose as the last survivors of a supposedly extinct loyalist chapter (the Silver Stars), and tell the planetary governor that allowing us to use their planet will allow them to be free of taxation forever, etc.
Ought to be entertaining to see all this work, but anyway, how hard should it be to commit planetary-scale astartes-grade tax fraud in the far future? I mentioned the expectation that we might have to con Ordo Hereticus, Sisters of Battle, loyalist Astartes (perhaps Apothecaries) and… probably an Arbites bastion. The only difficult part I expect, though, is geneseed samples… I wouldn't be remotely surprised if the reason the High Lords still maintain banks of traitor legion geneseed is just to make sure none of them CSM try this. So we may have to find some nice pure geneseed to donate.
The goal, naturally, being to build up forces, unmolested.
Has a story like this been done before?