I'm not sure where you're getting your information but that's not what Universal does for their big roller coasters. In fact, what Universal does is even WORSE than this policy at Cedar Point and I'd like to hope that no park ever ever ever adopts what Universal does. I honestly don't go to Universal as often as I used to because of their insulting loose articles policy where everyone is treated like a criminal. In order to ride a coaster like Hulk, you have to go through TWO METAL DETECTORS at their park! One to get into their park. One to get in line for the roller coaster. Sorry, you've lost me as a customer at the second metal detector.
I guess I was thinking only about Popeye & Bluto's waterproof center storage area, but I forgot about that annoying metal doctor business on the coasters.
Wouldn't this idea work for SV and TT though?