Ah, but they do have, in their opinion, a just cause and that is to prevent illegal use of someone else's tickets therefore depriving them of income needed to continue to run the parks. On many levels I disagree with this because I always feel that after I have paid them for the ticket it is my property and if I want someone else to use it, that is my business. That, however, is a completely different thread.
What it boils down to is entitlement. For some reason you feel above the rules and even though this isn't an attempt to catch you of committing fraud, you object to them making you do something that is below your status and dignity. Even though I object to their reason for doing the scan, I do understand why they do it and even though it is self serving for Disney, in a way it protects you as well. If it were common knowledge that this was OK, then your tickets would be prime targets for thieves and others that would profit from acquiring your tickets. As it is now, the threat of being caught at the gate is a pretty good deterrent.
I'm glad that you feel that you are above the rules that apply to the rest of us. Putting the CM in a position of deciding that the rules don't apply to you, risking their job because they have also been told to "let it go" instead of confronting an unreasonable guest, then why not do it.
Would someone speed on the highways because they don't agree with the posted limit? Take things from stores because they don't agree with the "no shoplifting" rule? Could they do those things and still maintain that they were just above that sort of thing? I don't think so, and I feel that this is pretty much the same thing.
Sorry but the "just cause I don't wanna" reason is not a good one, in my opinion.