Thanks, there is an interesting view of how the harriers relate to law in 'The Last Province' episode 25 between 1:03 and 1:08 (3+ hr podcast....).
Their opinion was that the Harriers needed to be kept secret as actual knowledge stops all the duelists etc who would otherwise be able to defend with a clear heart. They also make an interesting point on that the Harriers are generally internally aimed (i.e targetted at other clans) whereas the Scorpion similar units (Shinobi) can 'claim' they were told to protect the Empire against unseen threats. As far as I can tell those 'threats' tend to be internal and usually aimed at the Scorpion as well but that's just my opinion. Anyway it is an interesting counter argument whereas I think the world (both Rokugan and here) is more shades of grey and theirs seems to be more black and white. Pure good/evil never makes an interesting story as it just does not ring true.
I think FFG's world and beliefs in proof etc are more forgiving thus making the world both more human, realistic and less rigid. In my opinion (and it is just that) if someone came to court and screamed that the Crane illegally used gunpowder to blow up a Lion supply depot when the Lion was attacking Crane then the easy response is 'were they Crane? do you have proof, are you not trying to blame incompetance on your own commanders on us? perhaps it was a successful raid and you are feebly attempting to lie to blacken our name'. At this point the duelists get involved. Then the accusor is cut down which automatically means (under Rokugan law) that he/she was lying As far as the Clan Champion is concerned success covers a lot of sins and details can be avoided.
To my mind it is inherently more interesting to have a small subset of the Crane willing to go against everything most other Cranes respect most to ensure the Crane survives. The counter argument that all Crane are utterly honourable and would never do anything dishonourable seems something only a fake world would have especially as even in the old lore Crane's repeatedly did not behave in such a fashion for exactly the reasons I give.
I also agree that we should have only the odd Harrier card and not the AEG splurge of almost all military cards being Harriers. Since FFG has only printed one so far I don't think that is a trap they are falling into.
Finally I have adjusted the blog post slightly to include two quotes from 'The Crane' covering the Daidoji using these very methods along with Uji AND using black pepper. Therefore invalidating some of the incorrect opinions of other peeps above.