OK, just thought this one up:
SPOILERS,of course.
Is it possible to steal someone's Allomantic ability before they "snap?" Do you think that the Allomancy is part of a person's spiritweb enough that their ability could be stolen before it has become active? Having run this through my head, I can't decide. I'm leaning more towards no, because it hasn't manifest itself as an active part of their spiritweb, same as you couldn't use a Hemalurgic spike to steal someone's life force once they are dead, since, at that point, their spiritweb isn't tied to their body anymore. But, on the other hand (sorry for sounding like Tevye), it is ultimately a part of their spiritweb, and therefore could possibly be stolen. It all depends on if the ability has to be active to be stolen. Tell me what y'all think.
Thanks,
Nathan "Schventagon" Swensen