I think Disney could do a couple of simple things to (1) help first-time guests learn the ropes and (2) end (or at least slow) the scamming.
Right on the WDW site itself, they could clearly explain the Fast pass system and put in bold that only fast passes obtained in the park, on the day are valid, and that guests attempting to use fast passes purchased or obtained elsewhere will be ejected from the park. I did a search on "fast pass" at the WDW site and got NO relevant link returned; I also looked through their FAQs and found nothing. It should be there -- a description of the program to help explain the system. They should also include in their planning DVDs, where they DO demonstrate FPs, that "only fast passes obtained in the park, on the day are valid, and that guests attempting to use fast passes purchased or obtained elsewhere will be ejected from the park."
Next, when they send you your tickets or better yet, your confirmation letter (or both), they should include info about FPs and -- again -- "only fast passes obtained in the park, on the day are valid, and that guests attempting to use fast passes purchased or obtained elsewhere will be ejected from the park."
You see where I'm going with this! The info should be everywhere they can put it, even squeeze it on the back of the tickets themselves. Then they should enforce it by ejecting guests for the day, and that should get picked up by Orlando media and commented on obsessively here

so that it's clear what the program is, how it works, and what the consequences are for attempting to use counterfeited FPs.
I don't think Disney does nearly enough to inform the first-time (or really even the returning) guests at all the opportunities they have at their disposal to do so. I won't go OT and delve into the many areas I think they could improve the guest (and management!) experience by better communication -- but what do you all think of this in terms of this FP problem?