My son has done it several times both at WDW and DL. At WDW the first time he did it, he was about 5, was amazing. The cast members were wonderful to him and he had so much fun. They were very sensitive to his ASD diagnosis. The second time he was about 10 and it was a nightmare. He has a slow response time and froze in front of the crowd. He's super tall for his age, so he looks older. He's 13 now and 5'10 or 5'11. They seemed to peg him as a trouble maker from the start, even before they went out to start the show. He's not! He just has developmental and neurological disabilities. I told them ahead of time, but it's hard to understand, I guess. But anyway, they asked him to do something, he froze, he felt embarrassed, and tried to smile to cover it up, and they kicked him off the stage. The cast members made a big deal out of it and other parents in the audience booed him! My husband was filming on a Go Pro, so we have that little bit of memorabilia now. My son cried the entire day. He was broken hearted and humiliated. I called Disney after the trip to let them know for training purposes and they said they record the shows and saw what happened and were deeply apologetic. They told me they were re-training, so hopefully it's better now. Thankfully, my son's memory is sketchy and he has forgotten all about it. I will never forget, though. Why are adults so mean to kids?
We have had only good experiences at DL, BTW.
Maybe it was a fluke. They seem to be more compassionate to little kids with disabilities than teens.