I'm confused by the wording in the link. It mentions 'gated attractions' but then talks about entry into the park. Is it entry into the park or entry on to an attraction, or both?
I would highly disagree if this was entry into an attraction - or at least riding it or waiting. For instance, my kids love Aerosmith but I can handle it ONCE

So I let them go in the single riders line as many times as they want while I sit and wait for them. They are 8 & 10 currently. I see no issue with this - they are comfortable with the ride, they know what to do, and I am waiting for them at the exit.
Additionally, my DS10 will not ride Tower of Terror. He goes through the line with us and then uses the 'exit' just prior to the elevators as the rest of us get on the ride. He waits for us at the exit. Last time we were there, he decided he wanted to eat and wait for us while we did the ride. Again, it was all fine.
So if this means my family can not do this any longer, this will seriously decrease our enjoyment of the parks. Many older folks (and not much older than their 20s!) can't handle all the motion rides but the kids can so why would you want to prevent the kids from enjoying the rides if the guardian sincerely can't handle it?? Make the guardian suffer motion sickness or have upset kids because they can't ride it?
I'm hoping it has nothing to do with the attractions. As for entry to the park, it doesn't apply TOO much to me because I'm not a local. For our trips, we do sometimes split up but I do not feel my kids are old enough to go off on their own (even together) in a park. At 10 and 12, I will might let them go off together but I would still be in the same park. BUT, every child is different. I was babysitting babies, younger children, and mentally disabled ADULTs when I was 8 and I personally would have been fine. The problem is that Disney doesn't know if a child is responsible or not so this sounds like a way to mitigate that.
Now, I'd rather encounter 2 12 year old girls walking around the park than 2 15 year old boys

So I'm not sure if this is really accomplishing anything.
And to the poster that said the age should be 10 -

Disney ABSOLUTELY needs to align this thought of a 'child' and 'junior' across
ticket prices, meals, and entry to the park. A 10 year old can not enter the park, but must pay an adult's price so they must be there with an adult but they can not get a kids meal
