Based on the um, "security experts" I've met, they're not likely to take any laptops. Theirs is probably 'way nicer than any they might find at WDW.
I believe they would do it for the thrill of the hunt, and to boast at the next Hackercon that they beat Disney's RFID system.
That's why tying the MB id number to a database is a better solution than storing data on the MBs themselves. They can clone ID numbers all day long, but to actually use them will require access to pins and/or account data, which is tucked away in another system.
Would any real hacker brag that they cracked Disney's RFID system? Isn't that basically the equivalent to riding a bicycle with training wheels?