But players can also stumble across the Seventh Law, thanks to the particulars of its wording—namely, the prohibition against even researching the Outside.
I'm assuming this "wording'' refers to the fact that the Seventh Law forbids "Seeking Knowledge . . . from Beyond the Outer Gates". However, it seems to me that seeking knowledge
from Beyond is not quite the same as seeking knowledge
about it. Kind of like the difference between knowing theoretically how to build a bomb and actually building one. This brings up the question of why one would want to research the Ousiders, though. "The most merciful thing in the world, I think, is the inability of the human mind to correlate all its contents" and all that.
The stuff about there being an actual artifact called a Blackstaff that the Blackstaff wields is neat, too*. Could there then be an unoffical/homebuilt version floating about somewhere? Maybe not even a copy (if it's so secret), but something someone came up with independently? Of course, the likelyhood of this is dependent on what it actually does.
*Did y'all make this up for the game, or is this another one of those details I glossed over reading the books?