I can understand both the "mind my own business" as well as the "be confrontational" mind set.
But one thing about the "I just mind my own business" position---these people are cutting in front of YOU---doesn't that make it *YOUR* business? Just asking.
I wouldn't say anything to a CM. They can't spend their days enforcing courtesy rules--they just can't. I wouldn't even ask them to. They don't get paid enough, and don't have the authority (real or perceived) to effectively stop this behavior. EDIT TO SAY: Except in the case described by aarcher, above, where it's so clear cut, and the CM can verify. It's not a "your word" thing" And I wouldn't have felt like a rat. Consider the child just learned an invaluable lesson. Maybe it will even keep him out of prison, ha!
Part of me dreads Disney vacations because of the inevitable behavior such as has been described here. I try to take a tolerant view, and say, well, folks are just excited to be at Disney. Or they don't understand the tacit, unspoken rules.
Yeah. Right.
I tell you what I might do, as the situation allows--I would use my "presence"--physical and otherwise, to block this action. I'm THAT person--the kind of person to just step in front of you if you are line cutting, blocking your progress. I then make you ask to move ahead, and I just keep either staring at you or I will ask you, in a pleasant tone of voice, "where are you going? The line begins back *there*, see? Oh, your family is up there? Ah. But you are not up there, correct? And these people that are with you? They are your family, also? But they are here, not there?" I'm not going to scream and yell, I'm just going to ask--in a calm and reasonable voice.
I don't like bullies, and line-cutters are bullies. They assume they can assert their will over others and not be challenged. I don't like that, much.
It helps that I am (still) an amateur boxer and I am married to a former strong side linebacker for a professional football team. We are grandparents now, but some things don't change--at least not THAT much--not enough that I'm going to let someone cut the line with a hoard of barbarians, ahead of others that paid just as much as the barbarians, to ride the rides and see the shows and have been patiently waiting their turn. So if you are in line with me--I got your back.
LOL.
But hey, if you just had to run your little one to the restroom, it's all good. No worries. I'll hold your place. Obviously, it's a judgment call, and I try to always err on the side of giving others the benefit of the doubt--but sometimes it's pretty dang obvious what is happening.
I'm serious--my DH refuses to stay at any resort on the bus lines because of the obnoxious bus rider behavior we have experienced--- and because he always gives up his seat to the elderly (more elderly than us, ha ha) and women and children, he ends up standing. With his knees that's not fun.