Scam:noun 1.a confidence game or other fraudulent scheme, especially for making a quick profit; swindle.
People cutting in front of you at an attraction or a parade is technically, not a scam. Rude, inconsiderate, belligerent, and a lot of other words, yes.
Lying about an injury or medical condition to get an assistance pass is a scam.
Parking is a spot for the disabled with no placard or one that doesn't belong to you is a scam.
Trying to return merchandise you never paid for with out a receipt is a scam.
Getting you to pay tens of thousands of dollars to make your own bed and take out your own trash on vacation is a scam...no wait. As someone else pointed out, that's DVC.