Sure, but it creates several others, including less-than-ideal airflow at best and unsafe airflow at worst during a respiratory pandemic. It also - again - dramatically reduces the efficacy of a haunted house's intended effect and presentation.
I'm afraid we'll have to disagree if your position is that the benefits of plexi outweigh the negatives. I'm of the opinion this whole approach is a boneheaded decision born of skittish execs that want to make it appear like they're doing something when they have no guts to actually address the fundamental issues at play.
The cameras will not proactively prevent bad behavior - as I said, they will take offenders off the streets and prevent additional issues. You'd be shocked at how many incidents are caused by the same handful of people.
As for your experience with the 2020 mazes, I will again have to agree to disagree. One creative use of plexi to misdirect aside, they spoiled and diluted scares. Opinions will differ, of course, but I also know scare actors who hated performing with them. I personally would have no desire to, and that's without taking into consideration the health considerations.
It was a perfectly fine compromise when we were happy to have anything and when we knew less about transmission. We know more now, and I wish Universal would take more bold and beneficial steps to protect performers and guests.