Yes Disney has your money. But one could argue that disney could/should have got even more money from you if you played by the rules. ( and that's the reason for booking with a false arrival date : not paying the price you should have paid for your stay)
I'm not judging, but I understood Elise79's reply as a clever and friendly way to remind that we're not allowed to discuss ways of circumventig the system. And we can discuss until the end of time about right and wrong, it's really about bending rules.
Now, it's highly unlikely that disney would cancel a trip if the guest calls to say they have a delayed flight
In OP's case they would need to call to say that they are delayed for 2 days. I'm sure disney would be fine about this
Now what happens if OP really miss their flight ?
Hello we're 2 days late but guess what, we'll need another day to get there.
Disney's great at customer service, but even the strongest chain might break if you pull it hard enough