Here is the answer the other guest received:
"Here is what I received from Disney Guest Communications:
Dear Denise,
Thank you for contacting the Walt Disney World Resort.
We encourage our guests, especially children, to wear costumes to
Mickey's Not So Scary Halloween Party! As you select your costume for
this event, please keep the following guidelines in mind.
Costumes must not:
Cover the face or obstruct your vision
Hinder your ability to board our attractions or
transportation.
Drag on the ground.
Contain sharp or pointed objects that may injure other
guests.
Contain any part, prop or accessory that might be mistaken
for an actual weapon.
Be offensive to other guests.
Be taken as or cause confusion that they may be an actual
Disney character.
We thank you for adhering to these guidelines and hope that you and your
family have a safe and magical evening!
If you have questions or need further assistance, feel free to contact
us.
Please include your full name, E-Mail address, and reservation number if
applicable on all correspondence.
Thank you"
And here is the link to the actual thread:
http://www.disboards.com/showthread.php?t=1465543