We're at Kidani Village right now and one thing here is different than it was last week at OKW.
When you go to get on the internet in the room, you have to enter a 10-digit number off of your KTTW card. It doesn't reference your room number at all, like it did last week at OKW.
Since it requires your KTTW card to get on, I guess it pretty much knows whether you're a DVC member staying on points or not.
This would definitely make it possible for them to know that even if someone had a room on points, if they were not the actual member. Since it states usage is free to DVC-members, those that rent points, or even friends/relatives who are using points when the member is not there, may have to pay.
This is consistent with the POS which states that many of the perks of membership are not available to others who use the member's points while the member themself is not with them.