From Mouse Planet: http://www.mouseplanet.com/articles.php?art=wd070319mg
<H4>Woman arrested for selling bogus theme park tickets
</H4>Last Wednesday, detectives from the Osceola County Sheriff's Office Tourist Policing Unit arrested a 37-year-old woman for selling used multi-day theme park tickets following an investigation in conjunction with Universal Studios and Walt Disney World. Karrie Geith had used chemicals to remove the original names of the buyers and replaced them to make the tickets look new. She then sold them as new park tickets at a booth at 7620 W. Irlo Bronson Memorial Hwy (U.S. 192), just west of the World Drive entrance to Walt Disney World. She was arrested on misdemeanor charges of resale of multi-day tickets and fraudulent possession of admission tickets. The ticket booth, owned by Orlando Entertainment, is in rented space within a supermarket, and is not affiliated with the supermarket.
This just reinforces the warnings that we've sounded here before: If you're looking for a discount on park tickets, go through the licensed ticket brokers, of which there are several. MouseSavers.com has links to multiple brokers who have pretty good prices. If you want to be absolutely sure, but directly from Disney.