Exact quote from my letter:
"We attended Mickey's Not So Scary Halloween Party on Thursday night and were disappointed to see several guests on different occasions watching the parade without wristbands and even in some of the themed lands, hanging around after normal park closure. We had a great time, but couldn't help but wonder why these guests weren't asked to leave and dealt with in a more urgent fashion.
The perceived value is undermined when paying guests witness so many guests who didn't pay hang around with seemingly no consequences. We did notice guests being asked by cast members to show bands before entering rides, but other efforts were extremely lacking. Would it be possible implement some sort of process that herded all guests to the front of the park during regular closing time and only allow re-entry to special event guests, similar to rope drop? I realize this is difficult, but it certainly would give paying guests some satisfaction. Thanks for considering!"
My letter is longer and mentions a lot of positive things, but that was the section about the party. I vaguely remember a response that said it's up to the cast members to enforce the rules and they do their best, but sometimes it's difficult to enforce for large crowds and cast members get tired of telling people no. Of course, they will "re-train" them as much as possible and pass the feedback along.