Okay, this is pretty scummy Woman Creates Fake Mickey Mouse Business Cards, LinkedIn Page in Disney Ticket Scam: Prosecutors, and she was doing it to friends!
So where do you buy your tickets?
Online before you go? At the Park gate? From your hotel? From some random woman on the street?
For WDW I got them from the hotel I was staying at, or at least a voucher I exchanged at the Park gate. For every Park I've been to I just queued up when I got there.
Greg