I also want to speculate a little here that the reason for this policy is to more enforce some measure to keep people in check to make sure they are really all in the same family and at the same address. Furthermore, I don't know what the actual rules/laws/regulations are about assigning numbers to people outside of their actual area codes, though obviously GV does it and anyone can get a virtual number for an office so I would imagine that this is probably not too much of a factor.