According to wdwnt.com, those who abuse the Fast Pass system will now get their accounts locked. Here is the story:
http://wdwnt.com/blog/2017/06/disney-world-cracking-fastpass-cheating-will-begin-locking-guest-accounts-abuse-system/
Disney will soon be turning on a validation system of sorts for FastPass+ usage inside of the Walt Disney World theme parks.
A term dubbed “In-Park Validation” on internal documents, this phrase means the validation of park admission and entry