I don't see where a problem would exist, except for husbands/wives/family splitting up in which case one would hope that there would be a decision made by everyone using the primary card to cancel any other accounts on that card. As far as I can see, all that needs to happen is that a separate Content ID plus a Security Token be purchased for the family member(s). Assuming no mules, an extra $12.95 per month plus the cost of the token. Perhaps the extra token would not be necessary, not really sure. Maybe the extra money each month is not possible for a lot of people, but I do know quite a few players who can't play simultaneously because of this limitation and one in particular who got so frustrated by the negative responses from Customer Service that they bought a new system, new game and add-ons and started over.