I just had a conversation at work about this - it's happening everywhere, not just in the theme parks.

We see it at our beaches, in our stores and restaurants, in our parks and tourist places, at our workplaces. And yep, our numbers are skyrocketing.
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I'm sad to see that my previous analogy of the frog in a slowly heating pot of water is coming to fruition. Disney keeps moving the safety protocol goalposts a little at a time, and the majority of visitors accept it as being safe - I assume because of faith that Disney wouldn't make changes that aren't safe?
My problem isn't so much with the plexiglass, or reducing social distancing on rides (though I do find those troublesome): the latest changes make me feel less safe, so I'm just adding things to my personal Won't Do That list. My problem is this: in the beginning, Disney made a huuuuge effort to educate potential visitors on its COVID safety protocols and explained - with a medical officer - why the protocols are necessary. But it's radio silence on all the loosening of protocols. I haven't seen any expert say "Hey, it turns out social distancing isn't necessary on rides of any kind, only in the queues for the rides!" If that is true, it would be enormously beneficial to all types of businesses to have that information, so why be quiet about it? Unless it isn't true, of course.