The thing about "the secret" is, it's only the dark angels who treat it so seriously. Honestly, EVERY chapter has renegades (and apparently, the dark angels are the only ones who purge them with such... vehemence), and I have a feeling that the dark angels are the only chapter who takes it seriously enough that they haven't had any "new" ones since the Heresy.
Ultramarine: Hey! Who was that guy in the old Dark Angels panoply saying you were a traitor?
Ravenguard Dark Angel: ... Who? Oh, him? He's just a renegade out to besmirch our name. I've notified my chapter who will take him home and correct the issue.
Or Regular Dark Angel: He's obviously a raving insane traitor who I just shot in the face until he stopped spouting heresy.
Ultramarine: Oh... you mean... you don't just banish them and hope they won't cause anymore trouble until they realize the wrongness of their ways.
SpaceWolf: Ah, one of those, you don't send them away to learn the error of their ways in the honor guard of a Navigator?
Blood Angel: Or send them on a quest to redeem themselves?
Imperial Fist: Or let them take the Long Walk and battle the enemies of the Imperium by themselves until they die?
Dark Angel: ... what in the God-Emperor's name is wrong with you people? These folks are a stain on your chapter's honor and you just send them off to "be sorry" when they get around to it?
Chorus of Other Chapters: ... well... yeah?
Dark Angel: *facepalm*
Decent reactions to the knowledge that there are renegade dark angels happens in Blood Quest (Where the BA's on quest... really don't care, cause every chapter has renegades) and the... 4th or 5th Space Wolf book with the Dark Angels in it. It's a matter of personal honor, and if it were ever exposed... I actually think the Inquisition and the other chapters would give a giant... wtf? really? THAT was the big secret? Seriously guys... we just had an entire company go renegade last week... hell, half of the Blood Angels chapter under Dante tried to kill the other half because of a mutant who thought he was Sanguinius reborn... it's been 10,000 years of you guys hunting your renegades... I THINK you've done yer penance... cause otherwise... well, we all look terrible.



