What does a ship do with psyker children that are born "off the map"?
Are there agents of the inquisition on the ships which can sanction a psyker?
Is there some sort of psyker society which looks to (and eliminates, if necesary) psykers who are born in the far flung reaches of space?
What methods of detecting psykers are available to Rogue Trader captains? What about naval ships?
Ultimately, who is responsible for such things?