During an Area meeting when I worked at the world, the topic of late fastpasses was brought up due to the fact that the amount of fastpasses where increased per hour and weather or not we can put a cap on how late you return. Our managers said that we must always accept late fastpasses, no exceptions, unless that fastpass is from a previous date. Like I said before. do try and return in your alotted time to prevent long waits. and if you are in standby, do not complain if we have to close off your line for an alotted perioud of time. this is to ensure that the guest with the fastpasses can be on in as short amount of time as possible which is what fastpasses promise them. It is an 80 20 ration, 80% fastpass let through 20% standby, if done correctly there should be no fastpass line backup. picking a fight with the castmember at the erging point will only cause more backups. Be nice to castmembers, they put up with alot of crap all day and are just there to make everyone happy. if u are unhappy with something write a letter, do not start a scene infront of everyone. and just smile and understand they are doing their best.
As for the informing guest of late fastpass entry, we are told to inform the guest to show up between the time period. never tell them they can show up late. but liike I said, we will accept them late, we just don't advertise that