[quote=@Ashifili]
All things considered...yokai are generally a bunch of assholes, with the 'good' ones being rare exceptions. I mean, with humans as the majority and a bunch of shape-shifting, human-eating almost-immortal monsters as the minority, yeah, no shit humans would want to have a way of keeping track of them. It's not some secret police tasked with picking out ethnic minorities. It's a bunch of murder-hobos tasked with killing monsters who want to stay invisible and unknown for some edgy, possibly dangerous reason.

Just my thoughts though. Don't know why everyone else is so enamoured with a clean, happy fantasy world without discrimination. Maybe it's the modern sensibility. 
[/quote]

It really has nothing to do with modern sensibility or not wanting any discrimination in my fantasy, and I think it's disingenuous to assume that most Youkai within the context of this world are baby-eating monsters who could only ever want to hide for nefarious purposes. Whether you're a Youkai or some other race, you don't want to be branded by some visible mark that actively segregates you from the rest of the population, especially considering that Youkai would have no trouble fitting in otherwise. This is proven by the fact that everything was fine until they were discovered.

In fact, considering that they had to be [i]discovered[/i] in the first place, I think it's safe to assume that most were/are harmless.

And now they have a mark that, in a world that actively dislikes and fears them, shows them to be what they are when they probably just want to get along with everyone.

So, as Bee suggests, I'd like to explore the repercussions of that idea if we do go with it. Though to be candid, I would not throw my hat in with the magical Nazis come game time.