I see a couple of things going on in this thread.
One - I see a parent of a 2 yo that had a fit at Disney. Thats gotta be disappointing, no matter the reason. The parent blames the experience on the CMs, right or wrong, because that is how she perceived the situation. She decides to share - either to gain sympathy, or help other parents prepare, or just vent.
Two - Until this thread, I was not aware of how deep the Disney apologists have their mentality ingrained in their heads. Automatically, this parent is a terrible parent. All of the apologists are far better parents that would NEVER allow this event to happen with their 2 yo. And there is NO way that any blame could be placed on the beloved Mickey.
My reaction is this -
1. I think the OP is slightly off - I mean, the first post talks about how "grown up" the 5 and 2 yo are, and how "experienced" they are with character m&g's. Later she explaines how the 2 yo has "dozens" of Mickey autographs (that equates to Mickey signing his book once per month for the 2 yo's entire life, btw). Okay, so that stuff isn't quite normal, but it could be lost in translation. I'm giving the OP a bit of benefit of the doubt here. It does seem as thought the CM handler could have asked Mickey to sign the book once the CM observed the trouble. I mean, did OP explain to CM that this is what the 2 yo wanted/needed? Probably it all happened so fast that its hard to recall exactly. But I do understand leaving the scene the way OP did. If my 2 yo is throwing a fit, I try to remove her from the situation and calm her down. I doubt I'd make everyone else there gaze on our show and wait while I try to get the 2 yo "picture ready".
2. As mentioned above, I certainly think there is blame to go around, but holy cow, some of you defending Mickey here like he's family or something....some of y'all are just as kooky if not more than the OP appeared to be. We're talking about a parent here, a real person, who had a rough go. And some of you are berating her like she shot Mickey in the face or something. This Mickey was a kid in a costume. No chance he did anything wrong here? Or at least the CM handler did? I think a little empathy would be expected here. I too, think OP has responsibility, but I feel for her, and wonder if it couldn't have been handled better by the CMs. They make concessions for our parenting faults all the time.
Parenting, especially a 2 yo and 5 yo, is difficult enough, much less in the chaos that often is Disney. Even the most skilled, trained, schooled parent is gonna have some slip ups in those moments. I think the CMs had the ability to help this situation out, if not quell it all together. And maybe the parent didn't do all she could, but the CMs don't appear to have either.