I don't like the idea of enforcing the return time for a number of reasons [not all of which necessarily apply to me]:
- A fair-sized family has one "runner" go across the park to get FPs for a ride. When he gets there, he finds out the window is for 6:50-7:50, the family has a Le Cellier ADR for 7:10. He's gone across the park for nothing?
- A person gets an FP for Space, an hour before his window for Space he gets in a 20 minute standby line for Pirates, only to find a Castle show finished 5 minutes earlier and his wait is actually 50 minutes... But no worries, he has an hour window... Then Pirates goes 101 while he's in a boat. He finally exits with 15 minutes left in his window and runs smack into a parade on Main Street that he can't get around.
- A person wants TSMM FPs. There is the chance of going, finding out the window conflicts with your ADR and leaving with any hope of returning later and getting a usable window but the second available window conflicts again.
There are many other scenarios that make an enforced window a less than ideal policy.
In my case, I most often do respect the window on my FPs. Occasionally events or plans interfere, For example we might have an ADR we had to book six months ago and is going to charge my credit card if we don't show. I have on occasion "cheated" the FP system by getting two sets of FPs for the same ride, knowing that friends were joining us later that day who can't afford the expected standby time. By having four FPs instead of our usual two, we can "treat" our friends to a ride they wouldn't otherwise get to ride.