AGAIN, it doesn't say that it has to be a day that you "want to visit" - as you said you can leave the room empty if you wish. They never say anything about desire to physically stay in a room. The rules are very specific in their wording.
I have posted it many times but here you go again...
"Members may call Member Services or make a reservation online via the DVC Website no earlier than eleven (11) months prior to the desired check in day for a reservation"
Each reservation can only have 1 check in day. The definition of a check in day is the day your reservation will start.
You choose your desired check in day, then that determines if you are able to book yet.
If I start walking a reservation today solely for a stay next Christmas, my desired check in day is 12/25 and is over 11 months away. If I want to lie and say that my desired check in day is different to secure a reservation that I can modify forward later, I have now broken the 11 month FCFS rules. If Disney believes I have done so, they can now choose to do something about it or not.
Before they added the computer system and changed to check in day booking, there was no walking. You could not call before other members were eligible to book and extend your stay. You were calling each day and competing for any other members that wanted to book that day and any days further into the window, but you were NOT allowed in any way to book the day 11 months out ahead of anyone else.
And yes DVC can stop or prevent any booking if they feel it was not made within the rules.
"Use of Vacation Homes and recreational facilities for commercial purposes or any purpose other than the personal use described herein is expressly prohibited"
It does not say for any personal use, but any personal use "described herein" the rules. If you make a reservation, and they feel it was not for personal use, or was not within the rules, they can choose to do something about it if they wish, also as part of the rules.
"DVC Operator shall have the right to temporarily modify, adjust, or amend these Rules and Regulations, or suspend enforcement of, or make exceptions to enforcement of or adherence to, these Rules and Regulations"