This thread is a great example of the problem with WDW. Planning, and in this case, gaming the system is basically a necessity. It wouldn't be such a big deal if the OP was the only person working the system like this, the problem is, there are entire sites :cough: DIS :cough: dedicated to figuring out how to work each and every over planning system WDW has in place.
Walking back DVC ressies. FP+ tricks. Dining ressies. All kinds of "tips and tricks" designed to work the system. Now, if you don't take advantage of these things, you are at a disadvantage.
You want to get your panties in a bunch, and be angry with the OP, go ahead. But, it's not really their fault. So many people do things like this, it's more common then not in this demographic. It stinks out loud for a normal person just trying to enjoy WDW, but, Disney has set up this over planned system. If you want to blame anyone, blame TDO.