It's also the part that goes from pushing the boundaries of believability and bursts full on into being obvious fiction.
If you think teachers having kids role play the lives of other people is so crazy as to not have happened, I'm not sure what to tell you. I know that when I was a kid, one of the summer camps I went to did similar things. One year it was just live your day in a wheelchair. Another year it was role-play the lives of a very poor family, and have figure out how to handle a broken arm in one of the kids and still pay rent, eat, etc. These included going out into the world, not just staying in the camp.
I've heard other people who in school had to wear "pregnant suits" or carry "babies", or go around with blindfolds, and so on, to help them understand the situation other people may be in.
Perhaps it's the part where a mall worker runs into someone in another part of the mall later that day. I'm not sure how this even comes close to improbable. I've run into clerks who helped me in the food court before.
Overall, I'd rate this story as Extremely plausible. No single element of it is at all sketchy. Some of the coincidences are less likely to happen, but again, not even deserving of a rating rare, merely unlikely.
If the story teller had a 100 stories like this I would be more suspicious, but a single event that is unlikely is pretty believable.
Additionally, you insist that you don't understand our reasons for skepticism, and bring up total straw men when we have clearly explained our reasons.
I'm not going to sit here and try to convince you that it's bullshit. You clearly don't want to be convinced. You want to believe it. That's fine. Go ahead. But you do an incredibly poor job of being an advocate for the OP.
To me, it's as obvious that he's lying as it is the sky is blue.
As for your "clearly explained reasons", they are as I understand them:
1) the guy was nice oh no!
2) There were some events you've never experienced, therefore must strictly be false.
3) The guy talked about his experiences on his blog - obvious liar, not just telling about his life on a medium heavily used for that.
4) He doesn't remember every detail of something that happened some years ago. You know what. I am certain I don't remember every detail of every thing that happened to me too... sorry this is not even remotely useful criteria.
So, explain to me how the guy is obviously lying based on some pretty weak critera, and some really plausible events.
Right now you are just calling me stupid when I am trying to understand you - this is the type of bullshit that makes me wonder why I would even give credit to your claims. As soon as someone questions them, you claim "you are stupid" instead of explanation. Not a good way of being convincing or practical in an argument.
If pure glurge fiction, it would have ended with the narrator, or more likely the Apple store manager, receiving a note from the school, relating how the deaf kids had been treated poorly at every other store. Better yet, one of the deaf kids would have had a powerful father who went to the Apple store and lavished rewards on all the employees there. Father might even work for Microsoft. Let your imagination run wild.