As I understand this scenario, this family apparently parked at Downtown Disney and used the combination DD/OKW ferry and OKW/MGM bus service to avoid paying the $6 to park at MGM.
My first comment is that seems like a lot of trouble to save that amount of money.
But also, why do we assume that these people were knowingly engaging in unethical behavior (and teaching this to their kids). If there are no signs posted regarding the use of the OKW ferry being restricted, and no signs or ID checking on the busses, then how would they know that their plan for saving the $6 is "cheating?"
Maybe they did, maybe they didn't, but there are plenty of money-saving tips exchanged on the DIS boards every day that don't necessarily have ethical overtones (is it ethical to fill up your cooler from the resort ice machine?) Was any other guest inconvenienced by this "park at DD to avoid the parking fee" strategy?
Was it unethical to park at the GF and ride the monorail over to MK for the day before they posted the policies and put up the guardhouse?
On the other hand, the folks that were described at
MVMCP obviously were cheating, and teaching their children to cheat.
As with the parking situation at the resorts, WDW will respond to this situation when it inconveniences the other patrons and enough people complain about it--until then, it is just not cost-effective to enforce every rule to the max. If you are peeved about something, please let WDW know. In particular, let them know about the MVMCP cheats, because I'd like this problem fixed before I return next December!!