Well, while we're waiting, let's discuss whether Loud Ninja is a bastard role. Just brining it out since it's a role that Joe included in his previous game, and it was called bastard by at least three people already (HSL, blotunga, Lift), though blotunga appears to have been under a false assumption as to what Loud actually does.

So for reference:
_Ninja: gives a negative result to an investigation by Tracker, Watcher or similar
_Loud: informs the target of the action that they've been targetted (note: Joe's version of Loud simply informed me that I was targetted, without specifying by whom; the wiki version mentions that the target is informed who targetted them).

So, first of all, if the flavour here makes this combination more bastard (because ninjas aren't loud), then let's just substitue Stinky for Loud.

Now, for me a bastard modifier is one which affects the role's "active ingredient" so to speak. So an Insane Cop or a Naive Doctor would bastard because those modifiers affect what actually defines the role. An Insane Cop can't investigate properly, a Naive Doctor cannot protect. In Ninja's case however, the Stinky/Loud modifier has absolutely no effect on being Tracked/Watched/Followed... etc which is what defines a Ninja. A Ninja doesn't become less of a Ninja just because he's Stinky/Loud.

Another reason a role could be bastard is if it's severly overpowered or underpowered (e.g. Cult Leader, Jester). A Stinky/Loud Ninja is neither. In most cases the modifier won't have any effect at all, since the target will die anyway. It only comes into effect if the target survives (which doesn't happen often), and even then the target is only informed that they were targetted. Even if they were informed who targetted them, it doesn't give them any overpowered info. Quite the opposite: they're not sure if they were targetted by a Town PR so might want to be quiet so as not to out that PR to mafia.

Ergo my conclusion is:
Stinky/Loud Ninja is NOT a bastard role if the user is told they are Stinky/Loud. It makes for a nice role that's slightly more powerful than a Mafia Goon, while at the same time carries a small risk, so it's up to Mafia to determine whether they want to use him or not.

Which brings me to my next point. A bastard element can also be present if the mod lies in an unexpected way (as opposed to Godfather/Miller etc. which are kind of expected in GOG Mafia games). For example by telling a Mafia team that X is part of it, while in reality X is part of a secret Lover team.
Now, Joe didn't tell the Ninja that he had a Loud modifier, which could be considered bastard to a degree. However this still doesn't make Loud Ninja bastard. The bastardness here comes from the fact that it was hidden, not from the Loud-Ninja combination. So a (hidden)Loud Goon, or even a (hidden)Loud Cop or Doctor or whatever would be just as bastard as a (hidden)Loud Ninja.

Thoughts?